668008835 has 16 divisors (see below), whose sum is σ = 868395360. Its totient is φ = 493290720.

The previous prime is 668008819. The next prime is 668008843. The reversal of 668008835 is 538800866.

It is not a de Polignac number, because 668008835 - 2⁴ = 668008819 is a prime.

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, 19421 + ... + 41390.

It is an arithmetic number, because the mean of its divisors is an integer number (54274710).

Almost surely, 2^668008835 is an apocalyptic number.

668008835 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

668008835 is a deficient number, since it is larger than the sum of its proper divisors (200386525).

668008835 is an equidigital number, since it uses as much as digits as its factorization.

668008835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60855 (or 60829 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 668008835 is about 25845.8668842815. The cubic root of 668008835 is about 874.1663177735.

The spelling of 668008835 in words is "six hundred sixty-eight million, eight thousand, eight hundred thirty-five".