163660671 has 12 divisors (see below), whose sum is σ = 239638048. Its totient is φ = 107612064.

The previous prime is 163660619. The next prime is 163660681. The reversal of 163660671 is 176066361.

163660671 is a `hidden beast` number, since 16 + 36 + 606 + 7 + 1 = 666.

It is not a de Polignac number, because 163660671 - 2¹⁰ = 163659647 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 (163660681) 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, 123895 + ... + 125208.

Almost surely, 2^163660671 is an apocalyptic number.

163660671 is a deficient number, since it is larger than the sum of its proper divisors (75977377).

163660671 is a wasteful number, since it uses less digits than its factorization.

163660671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249182 (or 249179 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 163660671 is about 12792.9930430685. The cubic root of 163660671 is about 546.9925892491.

The spelling of 163660671 in words is "one hundred sixty-three million, six hundred sixty thousand, six hundred seventy-one".