2166260899 has 8 divisors (see below), whose sum is σ = 2363811840. Its totient is φ = 1968813000.

The previous prime is 2166260869. The next prime is 2166260917. The reversal of 2166260899 is 9980626612.

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

It is not a de Polignac number, because 2166260899 - 2⁹ = 2166260387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2166260849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22074 + ... + 69424.

It is an arithmetic number, because the mean of its divisors is an integer number (295476480).

Almost surely, 2^2166260899 is an apocalyptic number.

2166260899 is a deficient number, since it is larger than the sum of its proper divisors (197550941).

2166260899 is a wasteful number, since it uses less digits than its factorization.

2166260899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51521.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 2166260899 is about 46543.1079645526. The cubic root of 2166260899 is about 1293.9085627527.

The spelling of 2166260899 in words is "two billion, one hundred sixty-six million, two hundred sixty thousand, eight hundred ninety-nine".