16661004204 has 48 divisors (see below), whose sum is σ = 42002605568. Its totient is φ = 5109749568.

The previous prime is 16661004203. The next prime is 16661004209. The reversal of 16661004204 is 40240016661.

It is a super-2 number, since 2×16661004204² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16661004203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126052 + ... + 221835.

Almost surely, 2^16661004204 is an apocalyptic number.

It is an amenable number.

16661004204 is an abundant number, since it is smaller than the sum of its proper divisors (25341601364).

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

16661004204 is a wasteful number, since it uses less digits than its factorization.

16661004204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348214 (or 348212 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 16661004204 in words is "sixteen billion, six hundred sixty-one million, four thousand, two hundred four".