665433356664 has 64 divisors (see below), whose sum is σ = 1734085584000. Its totient is φ = 212527602560.

The previous prime is 665433356647. The next prime is 665433356683. The reversal of 665433356664 is 466653334566.

It is a super-2 number, since 2×665433356664² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3557994 + ... + 3740345.

It is an arithmetic number, because the mean of its divisors is an integer number (27095087250).

Almost surely, 2^665433356664 is an apocalyptic number.

It is an amenable number.

665433356664 is an abundant number, since it is smaller than the sum of its proper divisors (1068652227336).

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

665433356664 is a wasteful number, since it uses less digits than its factorization.

665433356664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7298508 (or 7298504 counting only the distinct ones).

The product of its digits is 83980800, while the sum is 57.

The spelling of 665433356664 in words is "six hundred sixty-five billion, four hundred thirty-three million, three hundred fifty-six thousand, six hundred sixty-four".