665025007 has 4 divisors (see below), whose sum is σ = 665078400. Its totient is φ = 664971616.

The previous prime is 665024977. The next prime is 665025017. The reversal of 665025007 is 700520566.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 665025007 - 2²³ = 656636399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665025007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665025017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2994 + ... + 36592.

It is an arithmetic number, because the mean of its divisors is an integer number (166269600).

Almost surely, 2^665025007 is an apocalyptic number.

665025007 is a deficient number, since it is larger than the sum of its proper divisors (53393).

665025007 is a wasteful number, since it uses less digits than its factorization.

665025007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53392.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 665025007 is about 25788.0787768302. The cubic root of 665025007 is about 872.8628144375.

The spelling of 665025007 in words is "six hundred sixty-five million, twenty-five thousand, seven".