166867617 has 16 divisors (see below), whose sum is σ = 254629760. Its totient is φ = 95219712.

The previous prime is 166867579. The next prime is 166867619. The reversal of 166867617 is 716768661.

It is not a de Polignac number, because 166867617 - 2⁷ = 166867489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166867619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10983 + ... + 21315.

It is an arithmetic number, because the mean of its divisors is an integer number (15914360).

Almost surely, 2^166867617 is an apocalyptic number.

It is an amenable number.

166867617 is a deficient number, since it is larger than the sum of its proper divisors (87762143).

166867617 is a wasteful number, since it uses less digits than its factorization.

166867617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11112.

The product of its digits is 508032, while the sum is 48.

The square root of 166867617 is about 12917.7249157892. The cubic root of 166867617 is about 550.5422937789.

The spelling of 166867617 in words is "one hundred sixty-six million, eight hundred sixty-seven thousand, six hundred seventeen".