166170959 has 4 divisors (see below), whose sum is σ = 170662104. Its totient is φ = 161679816.

The previous prime is 166170931. The next prime is 166170997. The reversal of 166170959 is 959071661.

It is a happy number.

166170959 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 959071661 = 1733 ⋅553417.

It is a cyclic number.

It is not a de Polignac number, because 166170959 - 2¹² = 166166863 is a prime.

It is a super-2 number, since 2×166170959² = 55225575229959362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166170919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2245517 + ... + 2245590.

It is an arithmetic number, because the mean of its divisors is an integer number (42665526).

Almost surely, 2^166170959 is an apocalyptic number.

166170959 is a deficient number, since it is larger than the sum of its proper divisors (4491145).

166170959 is an equidigital number, since it uses as much as digits as its factorization.

166170959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491144.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 166170959 is about 12890.7315153175. The cubic root of 166170959 is about 549.7750694564.

The spelling of 166170959 in words is "one hundred sixty-six million, one hundred seventy thousand, nine hundred fifty-nine".