668080899 has 8 divisors (see below), whose sum is σ = 989749520. Its totient is φ = 445387248.

The previous prime is 668080891. The next prime is 668080901. The reversal of 668080899 is 998080866.

It is not a de Polignac number, because 668080899 - 2³ = 668080891 is a prime.

668080899 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668080891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12371842 + ... + 12371895.

It is an arithmetic number, because the mean of its divisors is an integer number (123718690).

Almost surely, 2^668080899 is an apocalyptic number.

668080899 is a deficient number, since it is larger than the sum of its proper divisors (321668621).

668080899 is a wasteful number, since it uses less digits than its factorization.

668080899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24743746 (or 24743740 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 668080899 is about 25847.2609574013. The cubic root of 668080899 is about 874.1977513180.

The spelling of 668080899 in words is "six hundred sixty-eight million, eighty thousand, eight hundred ninety-nine".