6650045081 has 2 divisors, whose sum is σ = 6650045082. Its totient is φ = 6650045080.

The previous prime is 6650045053. The next prime is 6650045107. The reversal of 6650045081 is 1805400566.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4706646025 + 1943399056 = 68605^2 + 44084^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650045081 - 2²² = 6645850777 is a prime.

It is a super-2 number, since 2×6650045081² = 88446199158664593122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6650045021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325022540 + 3325022541.

It is an arithmetic number, because the mean of its divisors is an integer number (3325022541).

Almost surely, 2^6650045081 is an apocalyptic number.

It is an amenable number.

6650045081 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650045081 is an equidigital number, since it uses as much as digits as its factorization.

6650045081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 6650045081 is about 81547.8085603776. The cubic root of 6650045081 is about 1880.5066049280.

The spelling of 6650045081 in words is "six billion, six hundred fifty million, forty-five thousand, eighty-one".