16659788900 has 36 divisors (see below), whose sum is σ = 36483433140. Its totient is φ = 6602774400.

The previous prime is 16659788861. The next prime is 16659788909. The reversal of 16659788900 is 988795661.

It can be written as a sum of positive squares in 6 ways, for example, as 798401536 + 15861387364 = 28256^2 + 125942^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16659788900.

It is not an unprimeable number, because it can be changed into a prime (16659788909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 753311 + ... + 775110.

Almost surely, 2^16659788900 is an apocalyptic number.

16659788900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16659788900 is an abundant number, since it is smaller than the sum of its proper divisors (19823644240).

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

16659788900 is a wasteful number, since it uses less digits than its factorization.

16659788900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528544 (or 1528537 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 59.

The spelling of 16659788900 in words is "sixteen billion, six hundred fifty-nine million, seven hundred eighty-eight thousand, nine hundred".