2161328966 has 8 divisors (see below), whose sum is σ = 3432699000. Its totient is φ = 1017095968.

The previous prime is 2161328933. The next prime is 2161328969. The reversal of 2161328966 is 6698231612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161328969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31784216 + ... + 31784283.

It is an arithmetic number, because the mean of its divisors is an integer number (429087375).

Almost surely, 2^2161328966 is an apocalyptic number.

2161328966 is a deficient number, since it is larger than the sum of its proper divisors (1271370034).

2161328966 is a wasteful number, since it uses less digits than its factorization.

2161328966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63568518.

The product of its digits is 186624, while the sum is 44.

The square root of 2161328966 is about 46490.0953537417. The cubic root of 2161328966 is about 1292.9258680425.

The spelling of 2161328966 in words is "two billion, one hundred sixty-one million, three hundred twenty-eight thousand, nine hundred sixty-six".