91660166 has 8 divisors (see below), whose sum is σ = 148066464. Its totient is φ = 42304680.

The previous prime is 91660157. The next prime is 91660183. The reversal of 91660166 is 66106619.

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

It is a super-2 number, since 2×91660166² = 16803172062295112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762670 + ... + 1762721.

It is an arithmetic number, because the mean of its divisors is an integer number (18508308).

Almost surely, 2^91660166 is an apocalyptic number.

91660166 is a deficient number, since it is larger than the sum of its proper divisors (56406298).

91660166 is a wasteful number, since it uses less digits than its factorization.

91660166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3525406.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 91660166 is about 9573.9315852997. The cubic root of 91660166 is about 450.8792127572.

The spelling of 91660166 in words is "ninety-one million, six hundred sixty thousand, one hundred sixty-six".