16665225804 has 18 divisors (see below), whose sum is σ = 42125987540. Its totient is φ = 5555075256.

The previous prime is 16665225769. The next prime is 16665225809. The reversal of 16665225804 is 40852256661.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 16665225804.

It is not an unprimeable number, because it can be changed into a prime (16665225809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231461434 + ... + 231461505.

Almost surely, 2^16665225804 is an apocalyptic number.

It is an amenable number.

16665225804 is an abundant number, since it is smaller than the sum of its proper divisors (25460761736).

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

16665225804 is a wasteful number, since it uses less digits than its factorization.

16665225804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462922949 (or 462922944 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 16665225804 in words is "sixteen billion, six hundred sixty-five million, two hundred twenty-five thousand, eight hundred four".