166157420 has 144 divisors (see below), whose sum is σ = 426111840. Its totient is φ = 53913600.

The previous prime is 166157419. The next prime is 166157429. The reversal of 166157420 is 24751661.

166157420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166157429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1524326 + ... + 1524434.

It is an arithmetic number, because the mean of its divisors is an integer number (2959110).

Almost surely, 2^166157420 is an apocalyptic number.

166157420 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 166157420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213055920).

166157420 is an abundant number, since it is smaller than the sum of its proper divisors (259954420).

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

166157420 is a wasteful number, since it uses less digits than its factorization.

166157420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 166157420 is about 12890.2063598687. The cubic root of 166157420 is about 549.7601378324.

The spelling of 166157420 in words is "one hundred sixty-six million, one hundred fifty-seven thousand, four hundred twenty".