66862660 has 24 divisors (see below), whose sum is σ = 144942336. Its totient is φ = 25882080.

The previous prime is 66862637. The next prime is 66862681. The reversal of 66862660 is 6626866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53302 + ... + 54541.

It is an arithmetic number, because the mean of its divisors is an integer number (6039264).

Almost surely, 2^66862660 is an apocalyptic number.

It is an amenable number.

66862660 is an abundant number, since it is smaller than the sum of its proper divisors (78079676).

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

66862660 is a wasteful number, since it uses less digits than its factorization.

66862660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107883 (or 107881 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 66862660 is about 8176.9590924744. The cubic root of 66862660 is about 405.8771012907.

The spelling of 66862660 in words is "sixty-six million, eight hundred sixty-two thousand, six hundred sixty".