665702495 has 4 divisors (see below), whose sum is σ = 798843000. Its totient is φ = 532561992.

The previous prime is 665702459. The next prime is 665702503. The reversal of 665702495 is 594207566.

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-665702495 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66570245 + ... + 66570254.

It is an arithmetic number, because the mean of its divisors is an integer number (199710750).

Almost surely, 2^665702495 is an apocalyptic number.

665702495 is a deficient number, since it is larger than the sum of its proper divisors (133140505).

665702495 is a wasteful number, since it uses less digits than its factorization.

665702495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133140504.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 665702495 is about 25801.2111149845. The cubic root of 665702495 is about 873.1591207807.

The spelling of 665702495 in words is "six hundred sixty-five million, seven hundred two thousand, four hundred ninety-five".