79558661 has 8 divisors (see below), whose sum is σ = 97918464. Its totient is φ = 62947440.

The previous prime is 79558649. The next prime is 79558663. The reversal of 79558661 is 16685597.

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 79558661 - 2⁶ = 79558597 is a prime.

It is a super-2 number, since 2×79558661² = 12659161080225842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79558663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 437045 + ... + 437226.

It is an arithmetic number, because the mean of its divisors is an integer number (12239808).

Almost surely, 2^79558661 is an apocalyptic number.

It is an amenable number.

79558661 is a deficient number, since it is larger than the sum of its proper divisors (18359803).

79558661 is a wasteful number, since it uses less digits than its factorization.

79558661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874291.

The product of its digits is 453600, while the sum is 47.

The square root of 79558661 is about 8919.5661890027. The cubic root of 79558661 is about 430.0931130608.

The spelling of 79558661 in words is "seventy-nine million, five hundred fifty-eight thousand, six hundred sixty-one".