161866360 has 64 divisors (see below), whose sum is σ = 375580800. Its totient is φ = 62745600.

The previous prime is 161866343. The next prime is 161866363. The reversal of 161866360 is 63668161.

It is a happy number.

161866360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161866363) 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, 375345 + ... + 375775.

It is an arithmetic number, because the mean of its divisors is an integer number (5868450).

Almost surely, 2^161866360 is an apocalyptic number.

161866360 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 161866360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187790400).

161866360 is an abundant number, since it is smaller than the sum of its proper divisors (213714440).

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

161866360 is a wasteful number, since it uses less digits than its factorization.

161866360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 161866360 is about 12722.6711031921. The cubic root of 161866360 is about 544.9862353789.

The spelling of 161866360 in words is "one hundred sixty-one million, eight hundred sixty-six thousand, three hundred sixty".