6650645877797 has 2 divisors, whose sum is σ = 6650645877798. Its totient is φ = 6650645877796.

The previous prime is 6650645877779. The next prime is 6650645877853. The reversal of 6650645877797 is 7977785460566.

Together with previous prime (6650645877779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6399716014756 + 250929863041 = 2529766^2 + 500929^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650645877797 - 2¹⁴ = 6650645861413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6650645877097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325322938898 + 3325322938899.

It is an arithmetic number, because the mean of its divisors is an integer number (3325322938899).

Almost surely, 2^{6650645877797} is an apocalyptic number.

It is an amenable number.

6650645877797 is a deficient number, since it is larger than the sum of its proper divisors (1).

6650645877797 is an equidigital number, since it uses as much as digits as its factorization.

6650645877797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3734035200, while the sum is 77.

The spelling of 6650645877797 in words is "six trillion, six hundred fifty billion, six hundred forty-five million, eight hundred seventy-seven thousand, seven hundred ninety-seven".