89666665 has 8 divisors (see below), whose sum is σ = 117381888. Its totient is φ = 65212080.

The previous prime is 89666657. The next prime is 89666677. The reversal of 89666665 is 56666698.

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

It is not a de Polignac number, because 89666665 - 2³ = 89666657 is a prime.

It is a super-2 number, since 2×89666665² = 16080221624444450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815097 + ... + 815206.

It is an arithmetic number, because the mean of its divisors is an integer number (14672736).

Almost surely, 2^89666665 is an apocalyptic number.

It is an amenable number.

89666665 is a deficient number, since it is larger than the sum of its proper divisors (27715223).

89666665 is a wasteful number, since it uses less digits than its factorization.

89666665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630319.

The product of its digits is 2799360, while the sum is 52.

The square root of 89666665 is about 9469.2483862237. The cubic root of 89666665 is about 447.5865275916.

The spelling of 89666665 in words is "eighty-nine million, six hundred sixty-six thousand, six hundred sixty-five".