166415415125 has 16 divisors (see below), whose sum is σ = 210020007600. Its totient is φ = 131636454400.

The previous prime is 166415415059. The next prime is 166415415137. The reversal of 166415415125 is 521514514661.

It can be written as a sum of positive squares in 8 ways, for example, as 125899361329 + 40516053796 = 354823^2 + 201286^2 .

It is a de Polignac number, because none of the positive numbers 2^k-166415415125 is a prime.

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, 7468220 + ... + 7490469.

It is an arithmetic number, because the mean of its divisors is an integer number (13126250475).

Almost surely, 2^166415415125 is an apocalyptic number.

It is an amenable number.

166415415125 is a deficient number, since it is larger than the sum of its proper divisors (43604592475).

166415415125 is an equidigital number, since it uses as much as digits as its factorization.

166415415125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14958793 (or 14958783 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

Adding to 166415415125 its reverse (521514514661), we get a palindrome (687929929786).

The spelling of 166415415125 in words is "one hundred sixty-six billion, four hundred fifteen million, four hundred fifteen thousand, one hundred twenty-five".