666655551324 has 72 divisors (see below), whose sum is σ = 1926586378080. Its totient is φ = 190404519552.

The previous prime is 666655551239. The next prime is 666655551383. The reversal of 666655551324 is 423155556666.

It is a super-2 number, since 2×666655551324² (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 (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228562 + ... + 1177094.

It is an arithmetic number, because the mean of its divisors is an integer number (26758144140).

Almost surely, 2^666655551324 is an apocalyptic number.

It is an amenable number.

666655551324 is an abundant number, since it is smaller than the sum of its proper divisors (1259930826756).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666655551324 is a wasteful number, since it uses less digits than its factorization.

666655551324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951339 (or 951334 counting only the distinct ones).

The product of its digits is 19440000, while the sum is 54.

The spelling of 666655551324 in words is "six hundred sixty-six billion, six hundred fifty-five million, five hundred fifty-one thousand, three hundred twenty-four".