16659766380 has 96 divisors (see below), whose sum is σ = 46898691840. Its totient is φ = 4418737920.

The previous prime is 16659766309. The next prime is 16659766421. The reversal of 16659766380 is 8366795661.

It is a self number, because there is not a number n which added to its sum of digits gives 16659766380.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15269635 + ... + 15270725.

It is an arithmetic number, because the mean of its divisors is an integer number (488528040).

Almost surely, 2^16659766380 is an apocalyptic number.

16659766380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16659766380 is an abundant number, since it is smaller than the sum of its proper divisors (30238925460).

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

16659766380 is a wasteful number, since it uses less digits than its factorization.

16659766380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2239 (or 2237 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 16659766380 in words is "sixteen billion, six hundred fifty-nine million, seven hundred sixty-six thousand, three hundred eighty".