91666101 has 8 divisors (see below), whose sum is σ = 126164224. Its totient is φ = 59139360.

The previous prime is 91666093. The next prime is 91666111. The reversal of 91666101 is 10166619.

It is a happy number.

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

It is not a de Polignac number, because 91666101 - 2³ = 91666093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91666111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492736 + ... + 492921.

It is an arithmetic number, because the mean of its divisors is an integer number (15770528).

Almost surely, 2^91666101 is an apocalyptic number.

It is an amenable number.

91666101 is a deficient number, since it is larger than the sum of its proper divisors (34498123).

91666101 is a wasteful number, since it uses less digits than its factorization.

91666101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985691.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 91666101 is about 9574.2415365396. The cubic root of 91666101 is about 450.8889440305. Note that the first 3 decimals are identical.

The spelling of 91666101 in words is "ninety-one million, six hundred sixty-six thousand, one hundred one".