6666500 has 48 divisors (see below), whose sum is σ = 14851200. Its totient is φ = 2613600.

The previous prime is 6666487. The next prime is 6666509. The reversal of 6666500 is 56666.

It is a super-4 number, since 4×6666500⁴ (a number of 28 digits) contains 4444 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6666509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33401 + ... + 33599.

It is an arithmetic number, because the mean of its divisors is an integer number (309400).

Almost surely, 2^6666500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6666500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7425600).

6666500 is an abundant number, since it is smaller than the sum of its proper divisors (8184700).

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

6666500 is a wasteful number, since it uses less digits than its factorization.

6666500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 6666500 is about 2581.9566224087. The cubic root of 6666500 is about 188.2056373698.

It can be divided in two parts, 66 and 66500, that added together give a palindrome (66566).

The spelling of 6666500 in words is "six million, six hundred sixty-six thousand, five hundred".