2165166208466 has 8 divisors (see below), whose sum is σ = 3250709889660. Its totient is φ = 1081596245248.

The previous prime is 2165166208411. The next prime is 2165166208501. The reversal of 2165166208466 is 6648026615612.

It can be written as a sum of positive squares in 2 ways, for example, as 1987437355225 + 177728853241 = 1409765^2 + 421579^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493426751 + ... + 493431138.

Almost surely, 2^{2165166208466} is an apocalyptic number.

2165166208466 is a deficient number, since it is larger than the sum of its proper divisors (1085543681194).

2165166208466 is a wasteful number, since it uses less digits than its factorization.

2165166208466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986858988.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 2165166208466 in words is "two trillion, one hundred sixty-five billion, one hundred sixty-six million, two hundred eight thousand, four hundred sixty-six".