166321464 has 64 divisors (see below), whose sum is σ = 435594240. Its totient is φ = 52821120.

The previous prime is 166321439. The next prime is 166321471. The reversal of 166321464 is 464123661.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202174 + ... + 202994.

It is an arithmetic number, because the mean of its divisors is an integer number (6806160).

Almost surely, 2^166321464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166321464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (217797120).

166321464 is an abundant number, since it is smaller than the sum of its proper divisors (269272776).

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

166321464 is a wasteful number, since it uses less digits than its factorization.

166321464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220 (or 1216 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 166321464 is about 12896.5679155347. The cubic root of 166321464 is about 549.9410008338.

The spelling of 166321464 in words is "one hundred sixty-six million, three hundred twenty-one thousand, four hundred sixty-four".