161662122 has 32 divisors (see below), whose sum is σ = 362007360. Its totient is φ = 53473680.

The previous prime is 161662087. The next prime is 161662159. The reversal of 161662122 is 221266161.

161662122 is a `hidden beast` number, since 1 + 6 + 16 + 621 + 22 = 666.

It is a super-2 number, since 2×161662122² = 52269283379085768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

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, 4353 + ... + 18500.

It is an arithmetic number, because the mean of its divisors is an integer number (11312730).

Almost surely, 2^161662122 is an apocalyptic number.

161662122 is an abundant number, since it is smaller than the sum of its proper divisors (200345238).

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

161662122 is a wasteful number, since it uses less digits than its factorization.

161662122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22995 (or 22989 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 161662122 is about 12714.6420319252. The cubic root of 161662122 is about 544.7569232761.

The spelling of 161662122 in words is "one hundred sixty-one million, six hundred sixty-two thousand, one hundred twenty-two".