166006660 has 24 divisors (see below), whose sum is σ = 356723136. Its totient is φ = 64858080.

The previous prime is 166006639. The next prime is 166006661. The reversal of 166006660 is 66600661.

It is a super-2 number, since 2×166006660² = 55116422328711200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (166006661) by changing a digit.

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, 95656 + ... + 97375.

It is an arithmetic number, because the mean of its divisors is an integer number (14863464).

Almost surely, 2^166006660 is an apocalyptic number.

166006660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166006660 is an abundant number, since it is smaller than the sum of its proper divisors (190716476).

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

166006660 is a wasteful number, since it uses less digits than its factorization.

166006660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193083 (or 193081 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 166006660 is about 12884.3571822579. The cubic root of 166006660 is about 549.5938158025.

The spelling of 166006660 in words is "one hundred sixty-six million, six thousand, six hundred sixty".