16650377918 has 16 divisors (see below), whose sum is σ = 25654135920. Its totient is φ = 8099061696.

The previous prime is 16650377911. The next prime is 16650377921. The reversal of 16650377918 is 81977305661.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 16650377918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16650377911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830213 + ... + 850031.

It is an arithmetic number, because the mean of its divisors is an integer number (1603383495).

Almost surely, 2^16650377918 is an apocalyptic number.

16650377918 is a deficient number, since it is larger than the sum of its proper divisors (9003758002).

16650377918 is a wasteful number, since it uses less digits than its factorization.

16650377918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31211.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 16650377918 in words is "sixteen billion, six hundred fifty million, three hundred seventy-seven thousand, nine hundred eighteen".