91766808 has 216 divisors, whose sum is σ = 312776100. Its totient is φ = 24167808.

The previous prime is 91766791. The next prime is 91766809. The reversal of 91766808 is 80866719.

It is a happy number.

It is a super-2 number, since 2×91766808² = 16842294101017728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91766809) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2480166 + ... + 2480202.

Almost surely, 2^91766808 is an apocalyptic number.

91766808 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91766808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156388050).

91766808 is an abundant number, since it is smaller than the sum of its proper divisors (221009292).

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

91766808 is a wasteful number, since it uses less digits than its factorization.

91766808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 91766808 is about 9579.4993606138. The cubic root of 91766808 is about 451.0540034284.

The spelling of 91766808 in words is "ninety-one million, seven hundred sixty-six thousand, eight hundred eight".