665270716 has 48 divisors (see below), whose sum is σ = 1306166400. Its totient is φ = 293872320.

The previous prime is 665270677. The next prime is 665270729. The reversal of 665270716 is 617072566.

It is a happy number.

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, 428710 + ... + 430258.

It is an arithmetic number, because the mean of its divisors is an integer number (27211800).

Almost surely, 2^665270716 is an apocalyptic number.

It is an amenable number.

665270716 is a deficient number, since it is larger than the sum of its proper divisors (640895684).

665270716 is a wasteful number, since it uses less digits than its factorization.

665270716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1834 (or 1832 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 665270716 is about 25792.8423404634. The cubic root of 665270716 is about 872.9703010426.

The spelling of 665270716 in words is "six hundred sixty-five million, two hundred seventy thousand, seven hundred sixteen".