166253380 has 12 divisors (see below), whose sum is σ = 349132140. Its totient is φ = 66501344.

The previous prime is 166253377. The next prime is 166253383. The reversal of 166253380 is 83352661.

It is an interprime number because it is at equal distance from previous prime (166253377) and next prime (166253383).

It can be written as a sum of positive squares in 2 ways, for example, as 49224256 + 117029124 = 7016^2 + 10818^2 .

It is a super-2 number, since 2×166253380² = 55280372722848800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166253383) 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 3 ways as a sum of consecutive naturals, for example, 4156315 + ... + 4156354.

It is an arithmetic number, because the mean of its divisors is an integer number (29094345).

Almost surely, 2^166253380 is an apocalyptic number.

166253380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166253380 is an abundant number, since it is smaller than the sum of its proper divisors (182878760).

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

166253380 is a wasteful number, since it uses less digits than its factorization.

166253380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8312678 (or 8312676 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 166253380 is about 12893.9280283395. The cubic root of 166253380 is about 549.8659508025.

The spelling of 166253380 in words is "one hundred sixty-six million, two hundred fifty-three thousand, three hundred eighty".