166049280 has 120 divisors (see below), whose sum is σ = 575155152. Its totient is φ = 44273664.

The previous prime is 166049263. The next prime is 166049291. The reversal of 166049280 is 82940661.

166049280 is a `hidden beast` number, since 166 + 0 + 492 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19437 + ... + 26643.

Almost surely, 2^166049280 is an apocalyptic number.

166049280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166049280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287577576).

166049280 is an abundant number, since it is smaller than the sum of its proper divisors (409105872).

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

166049280 is an equidigital number, since it uses as much as digits as its factorization.

166049280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7217 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 166049280 is about 12886.0110197066. The cubic root of 166049280 is about 549.6408454099.

The spelling of 166049280 in words is "one hundred sixty-six million, forty-nine thousand, two hundred eighty".