665660470756 has 12 divisors (see below), whose sum is σ = 1165003315840. Its totient is φ = 332802380520.

The previous prime is 665660470711. The next prime is 665660470757. The reversal of 665660470756 is 657074066566.

It is a super-3 number, since 3×665660470756³ (a number of 36 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 665660470756.

It is not an unprimeable number, because it can be changed into a prime (665660470757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6909900 + ... + 7005571.

Almost surely, 2^665660470756 is an apocalyptic number.

It is an amenable number.

665660470756 is a deficient number, since it is larger than the sum of its proper divisors (499342845084).

665660470756 is a wasteful number, since it uses less digits than its factorization.

665660470756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13927434 (or 13927432 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 58.

The spelling of 665660470756 in words is "six hundred sixty-five billion, six hundred sixty million, four hundred seventy thousand, seven hundred fifty-six".