166201590 has 32 divisors (see below), whose sum is σ = 400375296. Its totient is φ = 44154720.

The previous prime is 166201547. The next prime is 166201591. The reversal of 166201590 is 95102661.

166201590 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166201591) 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 15 ways as a sum of consecutive naturals, for example, 2092 + ... + 18351.

It is an arithmetic number, because the mean of its divisors is an integer number (12511728).

Almost surely, 2^166201590 is an apocalyptic number.

166201590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166201590 is an abundant number, since it is smaller than the sum of its proper divisors (234173706).

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

166201590 is a wasteful number, since it uses less digits than its factorization.

166201590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20724.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 166201590 is about 12891.9195622685. The cubic root of 166201590 is about 549.8088481737.

The spelling of 166201590 in words is "one hundred sixty-six million, two hundred one thousand, five hundred ninety".