2166650049 has 4 divisors (see below), whose sum is σ = 2888866736. Its totient is φ = 1444433364.

The previous prime is 2166650041. The next prime is 2166650053. The reversal of 2166650049 is 9400566612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2166650049 - 2³ = 2166650041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2166649989 and 2166650016.

It is not an unprimeable number, because it can be changed into a prime (2166650041) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 361108339 + ... + 361108344.

It is an arithmetic number, because the mean of its divisors is an integer number (722216684).

Almost surely, 2^2166650049 is an apocalyptic number.

It is an amenable number.

2166650049 is a deficient number, since it is larger than the sum of its proper divisors (722216687).

2166650049 is an equidigital number, since it uses as much as digits as its factorization.

2166650049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722216686.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2166650049 is about 46547.2883098468. The cubic root of 2166650049 is about 1293.9860379342.

The spelling of 2166650049 in words is "two billion, one hundred sixty-six million, six hundred fifty thousand, forty-nine".