79528661 has 6 divisors (see below), whose sum is σ = 83935062. Its totient is φ = 75342600.

The previous prime is 79528649. The next prime is 79528717. The reversal of 79528661 is 16682597.

It can be written as a sum of positive squares in only one way, i.e., 73427761 + 6100900 = 8569^2 + 2470^2 .

It is a de Polignac number, because none of the positive numbers 2^k-79528661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79528621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109790 + ... + 110511.

It is an arithmetic number, because the mean of its divisors is an integer number (13989177).

Almost surely, 2^79528661 is an apocalyptic number.

It is an amenable number.

79528661 is a deficient number, since it is larger than the sum of its proper divisors (4406401).

79528661 is a wasteful number, since it uses less digits than its factorization.

79528661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220339 (or 220320 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 79528661 is about 8917.8843343026. The cubic root of 79528661 is about 430.0390463912.

The spelling of 79528661 in words is "seventy-nine million, five hundred twenty-eight thousand, six hundred sixty-one".