6646850137 has 2 divisors, whose sum is σ = 6646850138. Its totient is φ = 6646850136.

The previous prime is 6646850129. The next prime is 6646850153. The reversal of 6646850137 is 7310586466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6381453456 + 265396681 = 79884^2 + 16291^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646850137 - 2³ = 6646850129 is a prime.

It is not a weakly prime, because it can be changed into another prime (6646850117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323425068 + 3323425069.

It is an arithmetic number, because the mean of its divisors is an integer number (3323425069).

Almost surely, 2^6646850137 is an apocalyptic number.

It is an amenable number.

6646850137 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646850137 is an equidigital number, since it uses as much as digits as its factorization.

6646850137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 6646850137 is about 81528.2168147936. The cubic root of 6646850137 is about 1880.2054001664.

The spelling of 6646850137 in words is "six billion, six hundred forty-six million, eight hundred fifty thousand, one hundred thirty-seven".