89666091 has 12 divisors (see below), whose sum is σ = 129624040. Its totient is φ = 59728320.

The previous prime is 89666069. The next prime is 89666117. The reversal of 89666091 is 19066698.

It is a de Polignac number, because none of the positive numbers 2^k-89666091 is a prime.

It is a super-3 number, since 3×89666091³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89666021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10056 + ... + 16746.

Almost surely, 2^89666091 is an apocalyptic number.

89666091 is a deficient number, since it is larger than the sum of its proper divisors (39957949).

89666091 is a wasteful number, since it uses less digits than its factorization.

89666091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8186 (or 8183 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 89666091 is about 9469.2180775395. The cubic root of 89666091 is about 447.5855725164.

Adding to 89666091 its sum of digits (45), we get a triangular number (89666136 = T₁₃₃₉₁).

The spelling of 89666091 in words is "eighty-nine million, six hundred sixty-six thousand, ninety-one".