665393715 has 48 divisors (see below), whose sum is σ = 1350288576. Its totient is φ = 296755200.

The previous prime is 665393693. The next prime is 665393741. The reversal of 665393715 is 517393566.

665393715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665393715 - 2⁹ = 665393203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12846 + ... + 38675.

It is an arithmetic number, because the mean of its divisors is an integer number (28131012).

Almost surely, 2^665393715 is an apocalyptic number.

665393715 is an abundant number, since it is smaller than the sum of its proper divisors (684894861).

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

665393715 is a wasteful number, since it uses less digits than its factorization.

665393715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51580 (or 51577 counting only the distinct ones).

The product of its digits is 510300, while the sum is 45.

The square root of 665393715 is about 25795.2265933060. The cubic root of 665393715 is about 873.0240976174.

The spelling of 665393715 in words is "six hundred sixty-five million, three hundred ninety-three thousand, seven hundred fifteen".