666862464824 has 16 divisors (see below), whose sum is σ = 1265431786920. Its totient is φ = 329413988320.

The previous prime is 666862464809. The next prime is 666862464833. The reversal of 666862464824 is 428464268666.

It is a super-2 number, since 2×666862464824² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 502154807 + ... + 502156134.

Almost surely, 2^666862464824 is an apocalyptic number.

It is an amenable number.

666862464824 is a deficient number, since it is larger than the sum of its proper divisors (598569322096).

666862464824 is a wasteful number, since it uses less digits than its factorization.

666862464824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004311030 (or 1004311026 counting only the distinct ones).

The product of its digits is 127401984, while the sum is 62.

The spelling of 666862464824 in words is "six hundred sixty-six billion, eight hundred sixty-two million, four hundred sixty-four thousand, eight hundred twenty-four".