89511666 has 32 divisors (see below), whose sum is σ = 181560960. Its totient is φ = 29417856.

The previous prime is 89511649. The next prime is 89511671. The reversal of 89511666 is 66611598.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157030 + ... + 157598.

It is an arithmetic number, because the mean of its divisors is an integer number (5673780).

Almost surely, 2^89511666 is an apocalyptic number.

89511666 is an abundant number, since it is smaller than the sum of its proper divisors (92049294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

89511666 is a wasteful number, since it uses less digits than its factorization.

89511666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898.

The product of its digits is 77760, while the sum is 42.

The square root of 89511666 is about 9461.0605113803. The cubic root of 89511666 is about 447.3284774861.

It can be divided in two parts, 895 and 11666, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 89511666 in words is "eighty-nine million, five hundred eleven thousand, six hundred sixty-six".