66808893368 has 32 divisors (see below), whose sum is σ = 151583205600. Its totient is φ = 26948124672.

The previous prime is 66808893341. The next prime is 66808893373. The reversal of 66808893368 is 86339880866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35087753 + ... + 35089656.

It is an arithmetic number, because the mean of its divisors is an integer number (4736975175).

Almost surely, 2^66808893368 is an apocalyptic number.

66808893368 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66808893368 is an abundant number, since it is smaller than the sum of its proper divisors (84774312232).

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

66808893368 is a wasteful number, since it uses less digits than its factorization.

66808893368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70177439 (or 70177435 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 66808893368 in words is "sixty-six billion, eight hundred eight million, eight hundred ninety-three thousand, three hundred sixty-eight".