166163426 has 32 divisors (see below), whose sum is σ = 293666688. Its totient is φ = 69517440.

The previous prime is 166163419. The next prime is 166163429. The reversal of 166163426 is 624361661.

It is a super-2 number, since 2×166163426² = 55220568280114952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166163429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138686 + ... + 139878.

It is an arithmetic number, because the mean of its divisors is an integer number (9177084).

Almost surely, 2^166163426 is an apocalyptic number.

166163426 is a deficient number, since it is larger than the sum of its proper divisors (127503262).

166163426 is a wasteful number, since it uses less digits than its factorization.

166163426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706.

The product of its digits is 31104, while the sum is 35.

The square root of 166163426 is about 12890.4393253295. The cubic root of 166163426 is about 549.7667617108.

The spelling of 166163426 in words is "one hundred sixty-six million, one hundred sixty-three thousand, four hundred twenty-six".