666566631364 has 48 divisors (see below), whose sum is σ = 1199992763200. Its totient is φ = 323873168256.

The previous prime is 666566631361. The next prime is 666566631407. The reversal of 666566631364 is 463136665666.

It is a super-2 number, since 2×666566631364² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666566631299 and 666566631308.

It is not an unprimeable number, because it can be changed into a prime (666566631361) 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 15 ways as a sum of consecutive naturals, for example, 6639727 + ... + 6739369.

Almost surely, 2^666566631364 is an apocalyptic number.

It is an amenable number.

666566631364 is a deficient number, since it is larger than the sum of its proper divisors (533426131836).

666566631364 is a wasteful number, since it uses less digits than its factorization.

666566631364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100052 (or 100050 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 58.

The spelling of 666566631364 in words is "six hundred sixty-six billion, five hundred sixty-six million, six hundred thirty-one thousand, three hundred sixty-four".