16660515550325 has 12 divisors (see below), whose sum is σ = 20710558096068. Its totient is φ = 13295174496000.

The previous prime is 16660515550319. The next prime is 16660515550379. The reversal of 16660515550325 is 52305551506661.

16660515550325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 317528869009 + 16342986681316 = 563497^2 + 4042646^2 .

It is not a de Polignac number, because 16660515550325 - 2⁸ = 16660515550069 is a prime.

It is a super-2 number, since 2×16660515550325² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 830938382 + ... + 830958431.

It is an arithmetic number, because the mean of its divisors is an integer number (1725879841339).

Almost surely, 2^{16660515550325} is an apocalyptic number.

It is an amenable number.

16660515550325 is a deficient number, since it is larger than the sum of its proper divisors (4050042545743).

16660515550325 is a wasteful number, since it uses less digits than its factorization.

16660515550325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661897224 (or 1661897219 counting only the distinct ones).

The product of its (nonzero) digits is 4050000, while the sum is 50.

The spelling of 16660515550325 in words is "sixteen trillion, six hundred sixty billion, five hundred fifteen million, five hundred fifty thousand, three hundred twenty-five".