161008668 has 48 divisors (see below), whose sum is σ = 430904320. Its totient is φ = 51937200.

The previous prime is 161008663. The next prime is 161008669. The reversal of 161008668 is 866800161.

It is a super-2 number, since 2×161008668² = 51847582342268448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161008663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20698 + ... + 27393.

Almost surely, 2^161008668 is an apocalyptic number.

161008668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161008668 is an abundant number, since it is smaller than the sum of its proper divisors (269895652).

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

161008668 is a wasteful number, since it uses less digits than its factorization.

161008668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48135 (or 48127 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 161008668 is about 12688.9191029023. The cubic root of 161008668 is about 544.0219453013.

The spelling of 161008668 in words is "one hundred sixty-one million, eight thousand, six hundred sixty-eight".