166133440 has 112 divisors (see below), whose sum is σ = 436534560. Its totient is φ = 59719680.

The previous prime is 166133419. The next prime is 166133453. The reversal of 166133440 is 44331661.

It is a junction number, because it is equal to n+sod(n) for n = 166133399 and 166133408.

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, 383464 + ... + 383896.

It is an arithmetic number, because the mean of its divisors is an integer number (3897630).

Almost surely, 2^166133440 is an apocalyptic number.

166133440 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 166133440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218267280).

166133440 is an abundant number, since it is smaller than the sum of its proper divisors (270401120).

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

166133440 is a wasteful number, since it uses less digits than its factorization.

166133440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 166133440 is about 12889.2761627641. The cubic root of 166133440 is about 549.7336892546.

The spelling of 166133440 in words is "one hundred sixty-six million, one hundred thirty-three thousand, four hundred forty".