16664973228 has 36 divisors (see below), whose sum is σ = 42171270960. Its totient is φ = 5548935456.

The previous prime is 16664973187. The next prime is 16664973229. The reversal of 16664973228 is 82237946661.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (16664973229) 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, 218775 + ... + 284942.

Almost surely, 2^16664973228 is an apocalyptic number.

16664973228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16664973228 is an abundant number, since it is smaller than the sum of its proper divisors (25506297732).

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

16664973228 is a wasteful number, since it uses less digits than its factorization.

16664973228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504646 (or 504641 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The spelling of 16664973228 in words is "sixteen billion, six hundred sixty-four million, nine hundred seventy-three thousand, two hundred twenty-eight".