166506670 has 32 divisors (see below), whose sum is σ = 346195296. Its totient is φ = 56985600.

The previous prime is 166506647. The next prime is 166506679. The reversal of 166506670 is 76605661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166506679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42651 + ... + 46390.

It is an arithmetic number, because the mean of its divisors is an integer number (10818603).

Almost surely, 2^166506670 is an apocalyptic number.

166506670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166506670 is an abundant number, since it is smaller than the sum of its proper divisors (179688626).

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

166506670 is a wasteful number, since it uses less digits than its factorization.

166506670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89076.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 166506670 is about 12903.7463552257. The cubic root of 166506670 is about 550.1450526507.

The spelling of 166506670 in words is "one hundred sixty-six million, five hundred six thousand, six hundred seventy".