166451740 has 48 divisors (see below), whose sum is σ = 430218432. Its totient is φ = 52678656.

The previous prime is 166451731. The next prime is 166451783. The reversal of 166451740 is 47154661.

It is a junction number, because it is equal to n+sod(n) for n = 166451696 and 166451705.

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, 43909 + ... + 47548.

It is an arithmetic number, because the mean of its divisors is an integer number (8962884).

Almost surely, 2^166451740 is an apocalyptic number.

166451740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166451740 is an abundant number, since it is smaller than the sum of its proper divisors (263766692).

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

166451740 is a wasteful number, since it uses less digits than its factorization.

166451740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91486 (or 91484 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 166451740 is about 12901.6177280216. The cubic root of 166451740 is about 550.0845489855.

The spelling of 166451740 in words is "one hundred sixty-six million, four hundred fifty-one thousand, seven hundred forty".