166174140 has 144 divisors (see below), whose sum is σ = 523385856. Its totient is φ = 39346560.

The previous prime is 166174121. The next prime is 166174157. The reversal of 166174140 is 41471661.

It is a super-2 number, since 2×166174140² = 55227689609479200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 166174098 and 166174107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 340977 + ... + 341463.

It is an arithmetic number, because the mean of its divisors is an integer number (3634624).

Almost surely, 2^166174140 is an apocalyptic number.

166174140 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 166174140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261692928).

166174140 is an abundant number, since it is smaller than the sum of its proper divisors (357211716).

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

166174140 is a wasteful number, since it uses less digits than its factorization.

166174140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 166174140 is about 12890.8548979499. The cubic root of 166174140 is about 549.7785775370.

The spelling of 166174140 in words is "one hundred sixty-six million, one hundred seventy-four thousand, one hundred forty".