18766661796 has 24 divisors (see below), whose sum is σ = 48654308640. Its totient is φ = 6255553896.

The previous prime is 18766661761. The next prime is 18766661803. The reversal of 18766661796 is 69716666781.

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, 86882586 + ... + 86882801.

It is an arithmetic number, because the mean of its divisors is an integer number (2027262860).

Almost surely, 2^18766661796 is an apocalyptic number.

It is an amenable number.

18766661796 is an abundant number, since it is smaller than the sum of its proper divisors (29887646844).

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

18766661796 is a wasteful number, since it uses less digits than its factorization.

18766661796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173765400 (or 173765392 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 18766661796 in words is "eighteen billion, seven hundred sixty-six million, six hundred sixty-one thousand, seven hundred ninety-six".