166413125 has 10 divisors (see below), whose sum is σ = 207950622. Its totient is φ = 133130000.

The previous prime is 166413113. The next prime is 166413167. The reversal of 166413125 is 521314661.

It is a happy number.

166413125 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 5 ways, for example, as 36954241 + 129458884 = 6079^2 + 11378^2 .

It is not a de Polignac number, because 166413125 - 2¹⁸ = 166150981 is a prime.

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 9 ways as a sum of consecutive naturals, for example, 132506 + ... + 133755.

Almost surely, 2^166413125 is an apocalyptic number.

It is an amenable number.

166413125 is a deficient number, since it is larger than the sum of its proper divisors (41537497).

166413125 is an frugal number, since it uses more digits than its factorization.

166413125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266281 (or 266266 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 166413125 is about 12900.1211234624. The cubic root of 166413125 is about 550.0420078107.

Adding to 166413125 its reverse (521314661), we get a palindrome (687727786).

The spelling of 166413125 in words is "one hundred sixty-six million, four hundred thirteen thousand, one hundred twenty-five".