90799866 has 32 divisors (see below), whose sum is σ = 204278400. Its totient is φ = 30265164.

The previous prime is 90799859. The next prime is 90799889. The reversal of 90799866 is 66899709.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6006 + ... + 14753.

It is an arithmetic number, because the mean of its divisors is an integer number (6383700).

Almost surely, 2^90799866 is an apocalyptic number.

90799866 is an abundant number, since it is smaller than the sum of its proper divisors (113478534).

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

90799866 is an equidigital number, since it uses as much as digits as its factorization.

90799866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20782 (or 20764 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 90799866 is about 9528.8963684154. The cubic root of 90799866 is about 449.4641622040.

The spelling of 90799866 in words is "ninety million, seven hundred ninety-nine thousand, eight hundred sixty-six".