99680826 has 32 divisors (see below), whose sum is σ = 241246080. Its totient is φ = 26804736.

The previous prime is 99680773. The next prime is 99680899. The reversal of 99680826 is 62808699.

99680826 = 199² + 200² + ... + 674².

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

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, 69091 + ... + 70518.

It is an arithmetic number, because the mean of its divisors is an integer number (7538940).

Almost surely, 2^99680826 is an apocalyptic number.

99680826 is an abundant number, since it is smaller than the sum of its proper divisors (141565254).

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

99680826 is a wasteful number, since it uses less digits than its factorization.

99680826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139638.

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 99680826 is about 9984.0285456323. The cubic root of 99680826 is about 463.6645322161.

The spelling of 99680826 in words is "ninety-nine million, six hundred eighty thousand, eight hundred twenty-six".