99766620678 has 8 divisors (see below), whose sum is σ = 199533241368. Its totient is φ = 33255540224.

The previous prime is 99766620677. The next prime is 99766620683. The reversal of 99766620678 is 87602666799.

It is a sphenic number, since it is the product of 3 distinct primes.

99766620678 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99766620673) 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, 8313885051 + ... + 8313885062.

It is an arithmetic number, because the mean of its divisors is an integer number (24941655171).

Almost surely, 2^99766620678 is an apocalyptic number.

99766620678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

99766620678 is a wasteful number, since it uses less digits than its factorization.

99766620678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16627770118.

The product of its (nonzero) digits is 82301184, while the sum is 66.

The spelling of 99766620678 in words is "ninety-nine billion, seven hundred sixty-six million, six hundred twenty thousand, six hundred seventy-eight".