166712585 has 12 divisors (see below), whose sum is σ = 216628812. Its totient is φ = 123110208.

The previous prime is 166712551. The next prime is 166712587. The reversal of 166712585 is 585217661.

It can be written as a sum of positive squares in 6 ways, for example, as 50353216 + 116359369 = 7096^2 + 10787^2 .

It is not a de Polignac number, because 166712585 - 2¹⁶ = 166647049 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166712587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97802 + ... + 99491.

It is an arithmetic number, because the mean of its divisors is an integer number (18052401).

Almost surely, 2^166712585 is an apocalyptic number.

It is an amenable number.

166712585 is a deficient number, since it is larger than the sum of its proper divisors (49916227).

166712585 is a wasteful number, since it uses less digits than its factorization.

166712585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197324 (or 197311 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 166712585 is about 12911.7227742854. The cubic root of 166712585 is about 550.3717431738.

The spelling of 166712585 in words is "one hundred sixty-six million, seven hundred twelve thousand, five hundred eighty-five".