666436472356 has 24 divisors (see below), whose sum is σ = 1168686338400. Its totient is φ = 332526515712.

The previous prime is 666436472347. The next prime is 666436472389. The reversal of 666436472356 is 653274634666.

It is a self number, because there is not a number n which added to its sum of digits gives 666436472356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6412495 + ... + 6515593.

It is an arithmetic number, because the mean of its divisors is an integer number (48695264100).

Almost surely, 2^666436472356 is an apocalyptic number.

It is an amenable number.

666436472356 is a deficient number, since it is larger than the sum of its proper divisors (502249866044).

666436472356 is a wasteful number, since it uses less digits than its factorization.

666436472356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106443 (or 106441 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 58.

The spelling of 666436472356 in words is "six hundred sixty-six billion, four hundred thirty-six million, four hundred seventy-two thousand, three hundred fifty-six".