665264438715 has 8 divisors (see below), whose sum is σ = 1064423101968. Its totient is φ = 354807700640.

The previous prime is 665264438687. The next prime is 665264438717. The reversal of 665264438715 is 517834462566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665264438715 - 2³² = 660969471419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665264438717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22175481276 + ... + 22175481305.

It is an arithmetic number, because the mean of its divisors is an integer number (133052887746).

Almost surely, 2^665264438715 is an apocalyptic number.

665264438715 is a deficient number, since it is larger than the sum of its proper divisors (399158663253).

665264438715 is a wasteful number, since it uses less digits than its factorization.

665264438715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44350962589.

The product of its digits is 29030400, while the sum is 57.

The spelling of 665264438715 in words is "six hundred sixty-five billion, two hundred sixty-four million, four hundred thirty-eight thousand, seven hundred fifteen".