63078668665 has 16 divisors (see below), whose sum is σ = 75999902976. Its totient is φ = 50259398400.

The previous prime is 63078668647. The next prime is 63078668749. The reversal of 63078668665 is 56686687036.

It is a happy number.

It is not a de Polignac number, because 63078668665 - 2³³ = 54488734073 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, 5146945 + ... + 5159185.

It is an arithmetic number, because the mean of its divisors is an integer number (4749993936).

Almost surely, 2^63078668665 is an apocalyptic number.

It is an amenable number.

63078668665 is a deficient number, since it is larger than the sum of its proper divisors (12921234311).

63078668665 is a wasteful number, since it uses less digits than its factorization.

63078668665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16320.

The product of its (nonzero) digits is 52254720, while the sum is 61.

The spelling of 63078668665 in words is "sixty-three billion, seventy-eight million, six hundred sixty-eight thousand, six hundred sixty-five".