166227725 has 12 divisors (see below), whose sum is σ = 208016820. Its totient is φ = 131760000.

The previous prime is 166227709. The next prime is 166227731. The reversal of 166227725 is 527722661.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 256036 + 165971689 = 506^2 + 12883^2 .

It is not a de Polignac number, because 166227725 - 2⁴ = 166227709 is a prime.

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, 27776 + ... + 33225.

It is an arithmetic number, because the mean of its divisors is an integer number (17334735).

Almost surely, 2^166227725 is an apocalyptic number.

It is an amenable number.

166227725 is a deficient number, since it is larger than the sum of its proper divisors (41789095).

166227725 is a wasteful number, since it uses less digits than its factorization.

166227725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61120 (or 61115 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 166227725 is about 12892.9331418417. The cubic root of 166227725 is about 549.8376655898.

The spelling of 166227725 in words is "one hundred sixty-six million, two hundred twenty-seven thousand, seven hundred twenty-five".