665675039 has 4 divisors (see below), whose sum is σ = 694617456. Its totient is φ = 636732624.

The previous prime is 665674991. The next prime is 665675047. The reversal of 665675039 is 930576566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665675039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665674984 and 665675002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665675839) 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, 14471174 + ... + 14471219.

It is an arithmetic number, because the mean of its divisors is an integer number (173654364).

Almost surely, 2^665675039 is an apocalyptic number.

665675039 is a deficient number, since it is larger than the sum of its proper divisors (28942417).

665675039 is a wasteful number, since it uses less digits than its factorization.

665675039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28942416.

The product of its (nonzero) digits is 1020600, while the sum is 47.

The square root of 665675039 is about 25800.6790414516. The cubic root of 665675039 is about 873.1471165262.

The spelling of 665675039 in words is "six hundred sixty-five million, six hundred seventy-five thousand, thirty-nine".