161626166 has 16 divisors (see below), whose sum is σ = 261744000. Its totient is φ = 74409408.

The previous prime is 161626151. The next prime is 161626189. The reversal of 161626166 is 661626161.

It is a super-2 number, since 2×161626166² = 52246035071719112, which contains 22 as substring.

It is a Curzon number.

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, 3035 + ... + 18233.

It is an arithmetic number, because the mean of its divisors is an integer number (16359000).

Almost surely, 2^161626166 is an apocalyptic number.

161626166 is a deficient number, since it is larger than the sum of its proper divisors (100117834).

161626166 is a wasteful number, since it uses less digits than its factorization.

161626166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15623.

The product of its digits is 15552, while the sum is 35.

The square root of 161626166 is about 12713.2279929214. The cubic root of 161626166 is about 544.7165330020.

The spelling of 161626166 in words is "one hundred sixty-one million, six hundred twenty-six thousand, one hundred sixty-six".