166166546 has 72 divisors (see below), whose sum is σ = 320440320. Its totient is φ = 64393056.

The previous prime is 166166543. The next prime is 166166587. The reversal of 166166546 is 645661661.

166166546 = T₃₈₀ + T₃₈₁ + ... + T₁₀₁₆.

166166546 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×166166546² = 55222642019140232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166166543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1308335 + ... + 1308461.

It is an arithmetic number, because the mean of its divisors is an integer number (4450560).

Almost surely, 2^166166546 is an apocalyptic number.

166166546 is a deficient number, since it is larger than the sum of its proper divisors (154273774).

166166546 is a wasteful number, since it uses less digits than its factorization.

166166546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 228 counting only the distinct ones).

The product of its digits is 155520, while the sum is 41.

The square root of 166166546 is about 12890.5603446863. The cubic root of 166166546 is about 549.7702026235.

The spelling of 166166546 in words is "one hundred sixty-six million, one hundred sixty-six thousand, five hundred forty-six".