2166715650 has 48 divisors (see below), whose sum is σ = 5861955168. Its totient is φ = 525264000.

The previous prime is 2166715633. The next prime is 2166715687. The reversal of 2166715650 is 565176612.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2166715599 and 2166715608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 654931 + ... + 658230.

It is an arithmetic number, because the mean of its divisors is an integer number (122124066).

Almost surely, 2^2166715650 is an apocalyptic number.

2166715650 is an abundant number, since it is smaller than the sum of its proper divisors (3695239518).

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

2166715650 is a wasteful number, since it uses less digits than its factorization.

2166715650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313187 (or 1313182 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 2166715650 is about 46547.9929749930. The cubic root of 2166715650 is about 1293.9990974069. Note that the first 3 decimals are identical.

The spelling of 2166715650 in words is "two billion, one hundred sixty-six million, seven hundred fifteen thousand, six hundred fifty".