161115066 has 96 divisors (see below), whose sum is σ = 413157888. Its totient is φ = 44422560.

The previous prime is 161115043. The next prime is 161115067. The reversal of 161115066 is 660511161.

It is not an unprimeable number, because it can be changed into a prime (161115067) 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, 709645 + ... + 709871.

It is an arithmetic number, because the mean of its divisors is an integer number (4303728).

Almost surely, 2^161115066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161115066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206578944).

161115066 is an abundant number, since it is smaller than the sum of its proper divisors (252042822).

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

161115066 is a wasteful number, since it uses less digits than its factorization.

161115066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 161115066 is about 12693.1109661895. The cubic root of 161115066 is about 544.1417527258.

The spelling of 161115066 in words is "one hundred sixty-one million, one hundred fifteen thousand, sixty-six".