16664611013 has 8 divisors (see below), whose sum is σ = 16721654040. Its totient is φ = 16607641600.

The previous prime is 16664611009. The next prime is 16664611021. The reversal of 16664611013 is 31011646661.

It can be written as a sum of positive squares in 4 ways, for example, as 716204644 + 15948406369 = 26762^2 + 126287^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16664611013 - 2² = 16664611009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664611043) 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, 455813 + ... + 491013.

It is an arithmetic number, because the mean of its divisors is an integer number (2090206755).

Almost surely, 2^16664611013 is an apocalyptic number.

It is an amenable number.

16664611013 is a deficient number, since it is larger than the sum of its proper divisors (57043027).

16664611013 is a wasteful number, since it uses less digits than its factorization.

16664611013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36807.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 16664611013 in words is "sixteen billion, six hundred sixty-four million, six hundred eleven thousand, thirteen".