161422660 has 48 divisors (see below), whose sum is σ = 395337600. Its totient is φ = 55342560.

The previous prime is 161422619. The next prime is 161422693. The reversal of 161422660 is 66224161.

161422660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161422660² = 52114550322951200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 4906 + ... + 18625.

It is an arithmetic number, because the mean of its divisors is an integer number (8236200).

Almost surely, 2^161422660 is an apocalyptic number.

161422660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161422660 is an abundant number, since it is smaller than the sum of its proper divisors (233914940).

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

161422660 is a wasteful number, since it uses less digits than its factorization.

161422660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23561 (or 23545 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 161422660 is about 12705.2217611500. The cubic root of 161422660 is about 544.4878166506.

The spelling of 161422660 in words is "one hundred sixty-one million, four hundred twenty-two thousand, six hundred sixty".