91668306 has 8 divisors (see below), whose sum is σ = 183336624. Its totient is φ = 30556100.

The previous prime is 91668287. The next prime is 91668337. The reversal of 91668306 is 60386619.

It is a happy number.

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

91668306 is an admirable number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7639020 + ... + 7639031.

It is an arithmetic number, because the mean of its divisors is an integer number (22917078).

Almost surely, 2^91668306 is an apocalyptic number.

91668306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91668306 is a wasteful number, since it uses less digits than its factorization.

91668306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278056.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 91668306 is about 9574.3566885718. The cubic root of 91668306 is about 450.8925593334.

The spelling of 91668306 in words is "ninety-one million, six hundred sixty-eight thousand, three hundred six".