668837896 has 16 divisors (see below), whose sum is σ = 1294525440. Its totient is φ = 323631120.

The previous prime is 668837893. The next prime is 668837941. The reversal of 668837896 is 698738866.

It is a super-2 number, since 2×668837896² = 894688262251413632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (668837891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1348216 + ... + 1348711.

It is an arithmetic number, because the mean of its divisors is an integer number (80907840).

Almost surely, 2^668837896 is an apocalyptic number.

It is an amenable number.

668837896 is a deficient number, since it is larger than the sum of its proper divisors (625687544).

668837896 is a wasteful number, since it uses less digits than its factorization.

668837896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2696964 (or 2696960 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 61.

The square root of 668837896 is about 25861.9004715431. The cubic root of 668837896 is about 874.5278087939.

The spelling of 668837896 in words is "six hundred sixty-eight million, eight hundred thirty-seven thousand, eight hundred ninety-six".