63695665 has 16 divisors (see below), whose sum is σ = 84960576. Its totient is φ = 45448000.

The previous prime is 63695603. The next prime is 63695677. The reversal of 63695665 is 56659636.

It is not a de Polignac number, because 63695665 - 2⁹ = 63695153 is a prime.

It is a Duffinian 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, 8011 + ... + 13840.

It is an arithmetic number, because the mean of its divisors is an integer number (5310036).

Almost surely, 2^63695665 is an apocalyptic number.

It is an amenable number.

63695665 is a deficient number, since it is larger than the sum of its proper divisors (21264911).

63695665 is a wasteful number, since it uses less digits than its factorization.

63695665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21920.

The product of its digits is 874800, while the sum is 46.

The square root of 63695665 is about 7980.9563963224. The cubic root of 63695665 is about 399.3649610975.

The spelling of 63695665 in words is "sixty-three million, six hundred ninety-five thousand, six hundred sixty-five".