166325649 has 12 divisors (see below), whose sum is σ = 257974704. Its totient is φ = 95043144.

The previous prime is 166325647. The next prime is 166325651. The reversal of 166325649 is 946523661.

It is an interprime number because it is at equal distance from previous prime (166325647) and next prime (166325651).

It is not a de Polignac number, because 166325649 - 2¹ = 166325647 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 166325649.

It is not an unprimeable number, because it can be changed into a prime (166325641) 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, 565587 + ... + 565880.

It is an arithmetic number, because the mean of its divisors is an integer number (21497892).

Almost surely, 2^166325649 is an apocalyptic number.

It is an amenable number.

166325649 is a deficient number, since it is larger than the sum of its proper divisors (91649055).

166325649 is a wasteful number, since it uses less digits than its factorization.

166325649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131484 (or 1131477 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 166325649 is about 12896.7301669842. The cubic root of 166325649 is about 549.9456133549.

The spelling of 166325649 in words is "one hundred sixty-six million, three hundred twenty-five thousand, six hundred forty-nine".