166716725 has 12 divisors (see below), whose sum is σ = 236261664. Its totient is φ = 114319920.

The previous prime is 166716643. The next prime is 166716749. The reversal of 166716725 is 527617661.

It is not a de Polignac number, because 166716725 - 2¹⁴ = 166700341 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 11 ways as a sum of consecutive naturals, for example, 476159 + ... + 476508.

It is an arithmetic number, because the mean of its divisors is an integer number (19688472).

Almost surely, 2^166716725 is an apocalyptic number.

It is an amenable number.

166716725 is a deficient number, since it is larger than the sum of its proper divisors (69544939).

166716725 is an equidigital number, since it uses as much as digits as its factorization.

166716725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952684 (or 952679 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 166716725 is about 12911.8830927173. The cubic root of 166716725 is about 550.3762989589.

The spelling of 166716725 in words is "one hundred sixty-six million, seven hundred sixteen thousand, seven hundred twenty-five".