166853945 has 8 divisors (see below), whose sum is σ = 201332040. Its totient is φ = 132744960.

The previous prime is 166853941. The next prime is 166853957. The reversal of 166853945 is 549358661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23309584 + 143544361 = 4828^2 + 11981^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166853945 - 2² = 166853941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166853945.

It is not an unprimeable number, because it can be changed into a prime (166853941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91280 + ... + 93089.

It is an arithmetic number, because the mean of its divisors is an integer number (25166505).

Almost surely, 2^166853945 is an apocalyptic number.

It is an amenable number.

166853945 is a deficient number, since it is larger than the sum of its proper divisors (34478095).

166853945 is a wasteful number, since it uses less digits than its factorization.

166853945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184555.

The product of its digits is 777600, while the sum is 47.

The square root of 166853945 is about 12917.1957095958. The cubic root of 166853945 is about 550.5272574685.

The spelling of 166853945 in words is "one hundred sixty-six million, eight hundred fifty-three thousand, nine hundred forty-five".