66790910994 has 16 divisors (see below), whose sum is σ = 133620459840. Its totient is φ = 22257197360.

The previous prime is 66790910981. The next prime is 66790911013. The reversal of 66790910994 is 49901909766.

It is a super-2 number, since 2×66790910994² (a number of 22 digits) contains 22 as substring.

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, 1587414 + ... + 1628945.

It is an arithmetic number, because the mean of its divisors is an integer number (8351278740).

Almost surely, 2^66790910994 is an apocalyptic number.

66790910994 is an abundant number, since it is smaller than the sum of its proper divisors (66829548846).

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

66790910994 is a wasteful number, since it uses less digits than its factorization.

66790910994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219825.

The product of its (nonzero) digits is 6613488, while the sum is 60.

The spelling of 66790910994 in words is "sixty-six billion, seven hundred ninety million, nine hundred ten thousand, nine hundred ninety-four".