6666660000 has 1440 divisors, whose sum is σ = 32667643008. Its totient is φ = 1244160000.

The previous prime is 6666659981. The next prime is 6666660001. The reversal of 6666660000 is 666666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666660001) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 180179982 + ... + 180180018.

Almost surely, 2^6666660000 is an apocalyptic number.

6666660000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666660000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16333821504).

6666660000 is an abundant number, since it is smaller than the sum of its proper divisors (26000983008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6666660000 is a wasteful number, since it uses less digits than its factorization.

6666660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 6666660000 is about 81649.6172679334. The cubic root of 6666660000 is about 1882.0714304045.

6666660000 divided by its reverse (666666) gives a 4-th power (10000 = 10⁴).

It can be divided in two parts, 6666 and 660000, that added together give a palindrome (666666).

The spelling of 6666660000 in words is "six billion, six hundred sixty-six million, six hundred sixty thousand".