2165298966 has 40 divisors (see below), whose sum is σ = 4873144320. Its totient is φ = 718602192.

The previous prime is 2165298907. The next prime is 2165298979. The reversal of 2165298966 is 6698925612.

It is a happy number.

2165298966 is a `hidden beast` number, since 21 + 6 + 529 + 8 + 96 + 6 = 666.

It is a super-2 number, since 2×2165298966² = 9377039224321338312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7915 + ... + 66281.

It is an arithmetic number, because the mean of its divisors is an integer number (121828608).

Almost surely, 2^2165298966 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2165298966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436572160).

2165298966 is an abundant number, since it is smaller than the sum of its proper divisors (2707845354).

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

2165298966 is a wasteful number, since it uses less digits than its factorization.

2165298966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58610 (or 58601 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 2165298966 is about 46532.7730314882. The cubic root of 2165298966 is about 1293.7170133997.

The spelling of 2165298966 in words is "two billion, one hundred sixty-five million, two hundred ninety-eight thousand, nine hundred sixty-six".