66166166 has 16 divisors (see below), whose sum is σ = 108405648. Its totient is φ = 30038400.

The previous prime is 66166157. The next prime is 66166171.

66166166 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24986 + ... + 27506.

It is an arithmetic number, because the mean of its divisors is an integer number (6775353).

Almost surely, 2^66166166 is an apocalyptic number.

66166166 is a deficient number, since it is larger than the sum of its proper divisors (42239482).

66166166 is a wasteful number, since it uses less digits than its factorization.

66166166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727.

The product of its digits is 46656, while the sum is 38.

The square root of 66166166 is about 8134.2587861464. The cubic root of 66166166 is about 404.4628676806.

The spelling of 66166166 in words is "sixty-six million, one hundred sixty-six thousand, one hundred sixty-six".