665104512 has 32 divisors (see below), whose sum is σ = 1766684880. Its totient is φ = 221701376.

The previous prime is 665104507. The next prime is 665104529. The reversal of 665104512 is 215401566.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 665104512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865638 + ... + 866405.

Almost surely, 2^665104512 is an apocalyptic number.

It is an amenable number.

665104512 is an abundant number, since it is smaller than the sum of its proper divisors (1101580368).

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

665104512 is a wasteful number, since it uses less digits than its factorization.

665104512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732060 (or 1732048 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 665104512 is about 25789.6202376072. The cubic root of 665104512 is about 872.8975971860.

The spelling of 665104512 in words is "six hundred sixty-five million, one hundred four thousand, five hundred twelve".