79663661 has 12 divisors (see below), whose sum is σ = 101095200. Its totient is φ = 62075160.

The previous prime is 79663613. The next prime is 79663663. The reversal of 79663661 is 16636697.

It is not a de Polignac number, because 79663661 - 2²⁶ = 12554797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79663663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73361 + ... + 74438.

It is an arithmetic number, because the mean of its divisors is an integer number (8424600).

Almost surely, 2^79663661 is an apocalyptic number.

It is an amenable number.

79663661 is a deficient number, since it is larger than the sum of its proper divisors (21431539).

79663661 is a wasteful number, since it uses less digits than its factorization.

79663661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147824 (or 147817 counting only the distinct ones).

The product of its digits is 244944, while the sum is 44.

The square root of 79663661 is about 8925.4501847246. The cubic root of 79663661 is about 430.2822394398.

It can be divided in two parts, 796636 and 61, that added together give a palindrome (796697).

The spelling of 79663661 in words is "seventy-nine million, six hundred sixty-three thousand, six hundred sixty-one".