161660166 has 16 divisors (see below), whose sum is σ = 330200064. Its totient is φ = 52740104.

The previous prime is 161660131. The next prime is 161660183. The reversal of 161660166 is 661066161.

It is a super-2 number, since 2×161660166² = 52268018542295112, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286350 + ... + 286913.

It is an arithmetic number, because the mean of its divisors is an integer number (20637504).

Almost surely, 2^161660166 is an apocalyptic number.

161660166 is an abundant number, since it is smaller than the sum of its proper divisors (168539898).

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

161660166 is a wasteful number, since it uses less digits than its factorization.

161660166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573315.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 161660166 is about 12714.5651124999. The cubic root of 161660166 is about 544.7547262064.

The spelling of 161660166 in words is "one hundred sixty-one million, six hundred sixty thousand, one hundred sixty-six".