91856668 has 12 divisors (see below), whose sum is σ = 161417872. Its totient is φ = 45737280.

The previous prime is 91856663. The next prime is 91856671. The reversal of 91856668 is 86665819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91856663) 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, 46680 + ... + 48607.

Almost surely, 2^91856668 is an apocalyptic number.

It is an amenable number.

91856668 is a deficient number, since it is larger than the sum of its proper divisors (69561204).

91856668 is a wasteful number, since it uses less digits than its factorization.

91856668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95532 (or 95530 counting only the distinct ones).

The product of its digits is 622080, while the sum is 49.

The square root of 91856668 is about 9584.1884372126. The cubic root of 91856668 is about 451.2011826063.

The spelling of 91856668 in words is "ninety-one million, eight hundred fifty-six thousand, six hundred sixty-eight".