166260380 has 96 divisors (see below), whose sum is σ = 417348288. Its totient is φ = 54835200.

The previous prime is 166260379. The next prime is 166260401. The reversal of 166260380 is 83062661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 173984 + ... + 174936.

It is an arithmetic number, because the mean of its divisors is an integer number (4347378).

Almost surely, 2^166260380 is an apocalyptic number.

166260380 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 166260380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208674144).

166260380 is an abundant number, since it is smaller than the sum of its proper divisors (251087908).

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

166260380 is a wasteful number, since it uses less digits than its factorization.

166260380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1045 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 166260380 is about 12894.1994710800. The cubic root of 166260380 is about 549.8736679541.

The spelling of 166260380 in words is "one hundred sixty-six million, two hundred sixty thousand, three hundred eighty".