6666489600 has 216 divisors, whose sum is σ = 22220994432. Its totient is φ = 1759948800.

The previous prime is 6666489589. The next prime is 6666489601. The reversal of 6666489600 is 69846666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666489601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975915 + ... + 1979285.

Almost surely, 2^6666489600 is an apocalyptic number.

6666489600 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 6666489600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11110497216).

6666489600 is an abundant number, since it is smaller than the sum of its proper divisors (15554504832).

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

6666489600 is a wasteful number, since it uses less digits than its factorization.

6666489600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503 (or 3484 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 51.

The square root of 6666489600 is about 81648.5737781132. The cubic root of 6666489600 is about 1882.0553950033.

The spelling of 6666489600 in words is "six billion, six hundred sixty-six million, four hundred eighty-nine thousand, six hundred".