91668307 has 8 divisors (see below), whose sum is σ = 92788992. Its totient is φ = 90552000.

The previous prime is 91668287. The next prime is 91668337. The reversal of 91668307 is 70386619.

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

It is a cyclic number.

It is not a de Polignac number, because 91668307 - 2¹⁵ = 91635539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91668307.

It is not an unprimeable number, because it can be changed into a prime (91668337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61582 + ... + 63052.

It is an arithmetic number, because the mean of its divisors is an integer number (11598624).

Almost surely, 2^91668307 is an apocalyptic number.

91668307 is a deficient number, since it is larger than the sum of its proper divisors (1120685).

91668307 is a wasteful number, since it uses less digits than its factorization.

91668307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 91668307 is about 9574.3567407947. The cubic root of 91668307 is about 450.8925609729.

The spelling of 91668307 in words is "ninety-one million, six hundred sixty-eight thousand, three hundred seven".