665597007 has 20 divisors (see below), whose sum is σ = 1003099680. Its totient is φ = 439798464.

The previous prime is 665596979. The next prime is 665597017. The reversal of 665597007 is 700795566.

It is a happy number.

It is not a de Polignac number, because 665597007 - 2⁷ = 665596879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665597017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27207 + ... + 45512.

It is an arithmetic number, because the mean of its divisors is an integer number (50154984).

Almost surely, 2^665597007 is an apocalyptic number.

665597007 is a deficient number, since it is larger than the sum of its proper divisors (337502673).

665597007 is a wasteful number, since it uses less digits than its factorization.

665597007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72844 (or 72835 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The square root of 665597007 is about 25799.1667888713. The cubic root of 665597007 is about 873.1129977374.

The spelling of 665597007 in words is "six hundred sixty-five million, five hundred ninety-seven thousand, seven".