166620570 has 32 divisors (see below), whose sum is σ = 423413568. Its totient is φ = 41818368.

The previous prime is 166620541. The next prime is 166620607. The reversal of 166620570 is 75026661.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162844 + ... + 163863.

It is an arithmetic number, because the mean of its divisors is an integer number (13231674).

Almost surely, 2^166620570 is an apocalyptic number.

166620570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166620570 is an abundant number, since it is smaller than the sum of its proper divisors (256792998).

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

166620570 is a wasteful number, since it uses less digits than its factorization.

166620570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326734.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 166620570 is about 12908.1590476721. The cubic root of 166620570 is about 550.2704675243.

The spelling of 166620570 in words is "one hundred sixty-six million, six hundred twenty thousand, five hundred seventy".