665455272664 has 32 divisors (see below), whose sum is σ = 1535666015520. Its totient is φ = 263257030656.

The previous prime is 665455272649. The next prime is 665455272721. The reversal of 665455272664 is 466272554566.

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

It is a junction number, because it is equal to n+sod(n) for n = 665455272599 and 665455272608.

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 7 ways as a sum of consecutive naturals, for example, 457042729 + ... + 457044184.

It is an arithmetic number, because the mean of its divisors is an integer number (47989562985).

Almost surely, 2^665455272664 is an apocalyptic number.

It is an amenable number.

665455272664 is an abundant number, since it is smaller than the sum of its proper divisors (870210742856).

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

665455272664 is a wasteful number, since it uses less digits than its factorization.

665455272664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914086939 (or 914086935 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 58.

The spelling of 665455272664 in words is "six hundred sixty-five billion, four hundred fifty-five million, two hundred seventy-two thousand, six hundred sixty-four".