166163766 has 16 divisors (see below), whose sum is σ = 333905088. Its totient is φ = 55125000.

The previous prime is 166163761. The next prime is 166163779. The reversal of 166163766 is 667361661.

It is a super-2 number, since 2×166163766² = 55220794262605512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166163761) 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 7 ways as a sum of consecutive naturals, for example, 64360 + ... + 66891.

It is an arithmetic number, because the mean of its divisors is an integer number (20869068).

Almost surely, 2^166163766 is an apocalyptic number.

166163766 is an abundant number, since it is smaller than the sum of its proper divisors (167741322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166163766 is a wasteful number, since it uses less digits than its factorization.

166163766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131467.

The product of its digits is 163296, while the sum is 42.

The square root of 166163766 is about 12890.4525133915. The cubic root of 166163766 is about 549.7671366841.

The spelling of 166163766 in words is "one hundred sixty-six million, one hundred sixty-three thousand, seven hundred sixty-six".