666365027071264 has 48 divisors (see below), whose sum is σ = 1318711633562232. Its totient is φ = 331454157078528.

The previous prime is 666365027071253. The next prime is 666365027071321. The reversal of 666365027071264 is 462170720563666.

It can be written as a sum of positive squares in 4 ways, for example, as 248721034475664 + 417643992595600 = 15770892^2 + 20436340^2 .

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 7 ways as a sum of consecutive naturals, for example, 1904089642 + ... + 1904439574.

Almost surely, 2^{666365027071264} is an apocalyptic number.

It is an amenable number.

666365027071264 is a deficient number, since it is larger than the sum of its proper divisors (652346606490968).

666365027071264 is a wasteful number, since it uses less digits than its factorization.

666365027071264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658469 (or 658461 counting only the distinct ones).

The product of its (nonzero) digits is 91445760, while the sum is 61.

The spelling of 666365027071264 in words is "six hundred sixty-six trillion, three hundred sixty-five billion, twenty-seven million, seventy-one thousand, two hundred sixty-four".