166275820 has 12 divisors (see below), whose sum is σ = 349179264. Its totient is φ = 66510320.

The previous prime is 166275799. The next prime is 166275829. The reversal of 166275820 is 28572661.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 166275820.

It is not an unprimeable number, because it can be changed into a prime (166275829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4156876 + ... + 4156915.

It is an arithmetic number, because the mean of its divisors is an integer number (29098272).

Almost surely, 2^166275820 is an apocalyptic number.

166275820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166275820 is an abundant number, since it is smaller than the sum of its proper divisors (182903444).

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

166275820 is a wasteful number, since it uses less digits than its factorization.

166275820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8313800 (or 8313798 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 166275820 is about 12894.7981760088. The cubic root of 166275820 is about 549.8906890200.

The spelling of 166275820 in words is "one hundred sixty-six million, two hundred seventy-five thousand, eight hundred twenty".