666605512 has 48 divisors (see below), whose sum is σ = 1298406960. Its totient is φ = 320771616.

The previous prime is 666605477. The next prime is 666605521. The reversal of 666605512 is 215506666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1183743 + ... + 1184305.

It is an arithmetic number, because the mean of its divisors is an integer number (27050145).

Almost surely, 2^666605512 is an apocalyptic number.

It is an amenable number.

666605512 is a deficient number, since it is larger than the sum of its proper divisors (631801448).

666605512 is a wasteful number, since it uses less digits than its factorization.

666605512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 666605512 is about 25818.7046925286. The cubic root of 666605512 is about 873.5537521584.

The spelling of 666605512 in words is "six hundred sixty-six million, six hundred five thousand, five hundred twelve".