79922665 has 8 divisors (see below), whose sum is σ = 96896520. Its totient is φ = 63278592.

The previous prime is 79922657. The next prime is 79922669. The reversal of 79922665 is 56622997.

It can be written as a sum of positive squares in 4 ways, for example, as 5480281 + 74442384 = 2341^2 + 8628^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79922665 - 2³ = 79922657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79922669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81910 + ... + 82879.

It is an arithmetic number, because the mean of its divisors is an integer number (12112065).

Almost surely, 2^79922665 is an apocalyptic number.

It is an amenable number.

79922665 is a deficient number, since it is larger than the sum of its proper divisors (16973855).

79922665 is a wasteful number, since it uses less digits than its factorization.

79922665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164891.

The product of its digits is 408240, while the sum is 46.

The square root of 79922665 is about 8939.9477067822. The cubic root of 79922665 is about 430.7480489037.

The spelling of 79922665 in words is "seventy-nine million, nine hundred twenty-two thousand, six hundred sixty-five".