16366599808 has 96 divisors (see below), whose sum is σ = 36708460740. Its totient is φ = 7224999936.

The previous prime is 16366599793. The next prime is 16366599817. The reversal of 16366599808 is 80899566361.

It can be written as a sum of positive squares in 2 ways, for example, as 15978982464 + 387617344 = 126408^2 + 19688^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 870960 + ... + 889552.

Almost surely, 2^16366599808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16366599808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18354230370).

16366599808 is an abundant number, since it is smaller than the sum of its proper divisors (20341860932).

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

16366599808 is a wasteful number, since it uses less digits than its factorization.

16366599808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18666 (or 18631 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 16366599808 in words is "sixteen billion, three hundred sixty-six million, five hundred ninety-nine thousand, eight hundred eight".