66968081368 has 64 divisors (see below), whose sum is σ = 134291092320. Its totient is φ = 31198003200.

The previous prime is 66968081311. The next prime is 66968081371. The reversal of 66968081368 is 86318086966.

It is a super-2 number, since 2×66968081368² (a number of 22 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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7709988 + ... + 7718668.

Almost surely, 2^66968081368 is an apocalyptic number.

66968081368 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66968081368 is an abundant number, since it is smaller than the sum of its proper divisors (67323010952).

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

66968081368 is a wasteful number, since it uses less digits than its factorization.

66968081368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9268 (or 9264 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 66968081368 in words is "sixty-six billion, nine hundred sixty-eight million, eighty-one thousand, three hundred sixty-eight".