89666679 has 4 divisors (see below), whose sum is σ = 119555576. Its totient is φ = 59777784.

The previous prime is 89666677. The next prime is 89666683. The reversal of 89666679 is 97666698.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 89666679 - 2¹ = 89666677 is a prime.

It is a super-2 number, since 2×89666679² = 16080226645778082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89666677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14944444 + ... + 14944449.

It is an arithmetic number, because the mean of its divisors is an integer number (29888894).

Almost surely, 2^89666679 is an apocalyptic number.

89666679 is a deficient number, since it is larger than the sum of its proper divisors (29888897).

89666679 is a wasteful number, since it uses less digits than its factorization.

89666679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29888896.

The product of its digits is 5878656, while the sum is 57.

The square root of 89666679 is about 9469.2491254587. The cubic root of 89666679 is about 447.5865508860.

The spelling of 89666679 in words is "eighty-nine million, six hundred sixty-six thousand, six hundred seventy-nine".