664644365462 has 64 divisors (see below), whose sum is σ = 1282583393280. Its totient is φ = 250792051200.

The previous prime is 664644365459. The next prime is 664644365509. The reversal of 664644365462 is 264563446466.

It is a super-3 number, since 3×664644365462³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664644365398 and 664644365407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 480839 + ... + 1249197.

It is an arithmetic number, because the mean of its divisors is an integer number (20040365520).

Almost surely, 2^664644365462 is an apocalyptic number.

664644365462 is a deficient number, since it is larger than the sum of its proper divisors (617939027818).

664644365462 is a wasteful number, since it uses less digits than its factorization.

664644365462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768557.

The product of its digits is 59719680, while the sum is 56.

The spelling of 664644365462 in words is "six hundred sixty-four billion, six hundred forty-four million, three hundred sixty-five thousand, four hundred sixty-two".