666668134808 has 32 divisors (see below), whose sum is σ = 1368973040400. Its totient is φ = 302477847168.

The previous prime is 666668134751. The next prime is 666668134831. The reversal of 666668134808 is 808431866666.

It is a super-2 number, since 2×666668134808² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54318191 + ... + 54330462.

Almost surely, 2^666668134808 is an apocalyptic number.

It is an amenable number.

666668134808 is an abundant number, since it is smaller than the sum of its proper divisors (702304905592).

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

666668134808 is a wasteful number, since it uses less digits than its factorization.

666668134808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108648731 (or 108648727 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 62.

The spelling of 666668134808 in words is "six hundred sixty-six billion, six hundred sixty-eight million, one hundred thirty-four thousand, eight hundred eight".