166120317 has 24 divisors (see below), whose sum is σ = 262211040. Its totient is φ = 100507680.

The previous prime is 166120313. The next prime is 166120337. The reversal of 166120317 is 713021661.

166120317 is a `hidden beast` number, since 16 + 612 + 0 + 31 + 7 = 666.

It is not a de Polignac number, because 166120317 - 2² = 166120313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166120313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80859 + ... + 82887.

It is an arithmetic number, because the mean of its divisors is an integer number (10925460).

Almost surely, 2^166120317 is an apocalyptic number.

It is an amenable number.

166120317 is a deficient number, since it is larger than the sum of its proper divisors (96090723).

166120317 is a wasteful number, since it uses less digits than its factorization.

166120317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873 (or 2870 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 166120317 is about 12888.7670861103. The cubic root of 166120317 is about 549.7192142535.

Adding to 166120317 its reverse (713021661), we get a palindrome (879141978).

The spelling of 166120317 in words is "one hundred sixty-six million, one hundred twenty thousand, three hundred seventeen".