15660166225 has 48 divisors (see below), whose sum is σ = 22604892480. Its totient is φ = 10641715200.

The previous prime is 15660166219. The next prime is 15660166229. The reversal of 15660166225 is 52266106651.

15660166225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15660166225 - 2⁹ = 15660165713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15660166229) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 360897 + ... + 401953.

It is an arithmetic number, because the mean of its divisors is an integer number (470935260).

Almost surely, 2^15660166225 is an apocalyptic number.

It is an amenable number.

15660166225 is a deficient number, since it is larger than the sum of its proper divisors (6944726255).

15660166225 is a wasteful number, since it uses less digits than its factorization.

15660166225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41170 (or 41165 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 15660166225 in words is "fifteen billion, six hundred sixty million, one hundred sixty-six thousand, two hundred twenty-five".