16666436664 has 32 divisors (see below), whose sum is σ = 46295658000. Its totient is φ = 5555478816.

The previous prime is 16666436629. The next prime is 16666436669. The reversal of 16666436664 is 46663466661.

It is a super-2 number, since 2×16666436664² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 16666436664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666436669) 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, 38579499 + ... + 38579930.

Almost surely, 2^16666436664 is an apocalyptic number.

It is an amenable number.

16666436664 is an abundant number, since it is smaller than the sum of its proper divisors (29629221336).

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

16666436664 is a wasteful number, since it uses less digits than its factorization.

16666436664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77159444 (or 77159434 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 54.

The spelling of 16666436664 in words is "sixteen billion, six hundred sixty-six million, four hundred thirty-six thousand, six hundred sixty-four".