91307666 has 8 divisors (see below), whose sum is σ = 138040320. Its totient is φ = 45294228.

The previous prime is 91307659. The next prime is 91307669. The reversal of 91307666 is 66670319.

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

It is not an unprimeable number, because it can be changed into a prime (91307669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179486 + ... + 179993.

It is an arithmetic number, because the mean of its divisors is an integer number (17255040).

Almost surely, 2^91307666 is an apocalyptic number.

91307666 is a deficient number, since it is larger than the sum of its proper divisors (46732654).

91307666 is a wasteful number, since it uses less digits than its factorization.

91307666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359608.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 91307666 is about 9555.5044869436. The cubic root of 91307666 is about 450.3004840830.

The spelling of 91307666 in words is "ninety-one million, three hundred seven thousand, six hundred sixty-six".