166018660 has 12 divisors (see below), whose sum is σ = 348639228. Its totient is φ = 66407456.

The previous prime is 166018621. The next prime is 166018673. The reversal of 166018660 is 66810661.

It can be written as a sum of positive squares in 2 ways, for example, as 53319204 + 112699456 = 7302^2 + 10616^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4150447 + ... + 4150486.

It is an arithmetic number, because the mean of its divisors is an integer number (29053269).

Almost surely, 2^166018660 is an apocalyptic number.

166018660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166018660 is an abundant number, since it is smaller than the sum of its proper divisors (182620568).

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

166018660 is a wasteful number, since it uses less digits than its factorization.

166018660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300942 (or 8300940 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 166018660 is about 12884.8228548164. The cubic root of 166018660 is about 549.6070581766.

The spelling of 166018660 in words is "one hundred sixty-six million, eighteen thousand, six hundred sixty".