16660322716664 has 64 divisors (see below), whose sum is σ = 34426637491680. Its totient is φ = 7495433280000.

The previous prime is 16660322716613. The next prime is 16660322716703. The reversal of 16660322716664 is 46661722306661.

16660322716664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26899982 + ... + 27512354.

Almost surely, 2^{16660322716664} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16660322716664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17213318745840).

16660322716664 is an abundant number, since it is smaller than the sum of its proper divisors (17766314775016).

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

16660322716664 is a wasteful number, since it uses less digits than its factorization.

16660322716664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615552 (or 615548 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 16660322716664 in words is "sixteen trillion, six hundred sixty billion, three hundred twenty-two million, seven hundred sixteen thousand, six hundred sixty-four".