16664351564 has 24 divisors (see below), whose sum is σ = 33435886848. Its totient is φ = 7118897040.

The previous prime is 16664351513. The next prime is 16664351591. The reversal of 16664351564 is 46515346661.

16664351564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16664351564² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948134 + ... + 965549.

It is an arithmetic number, because the mean of its divisors is an integer number (1393161952).

Almost surely, 2^16664351564 is an apocalyptic number.

16664351564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16664351564 is an abundant number, since it is smaller than the sum of its proper divisors (16771535284).

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

16664351564 is a wasteful number, since it uses less digits than its factorization.

16664351564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914005 (or 1914003 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 47.

The spelling of 16664351564 in words is "sixteen billion, six hundred sixty-four million, three hundred fifty-one thousand, five hundred sixty-four".