166665606 has 16 divisors (see below), whose sum is σ = 350875200. Its totient is φ = 52631208.

The previous prime is 166665601. The next prime is 166665683. The reversal of 166665606 is 606566661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166665601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730876 + ... + 731103.

It is an arithmetic number, because the mean of its divisors is an integer number (21929700).

Almost surely, 2^166665606 is an apocalyptic number.

166665606 is an abundant number, since it is smaller than the sum of its proper divisors (184209594).

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

166665606 is a wasteful number, since it uses less digits than its factorization.

166665606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462003.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 166665606 is about 12909.9034078493. The cubic root of 166665606 is about 550.3200407319.

The spelling of 166665606 in words is "one hundred sixty-six million, six hundred sixty-five thousand, six hundred six".