68646620033 has 2 divisors, whose sum is σ = 68646620034. Its totient is φ = 68646620032.

The previous prime is 68646620011. The next prime is 68646620039. The reversal of 68646620033 is 33002664686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58965437584 + 9681182449 = 242828^2 + 98393^2 .

It is a cyclic number.

It is not a de Polignac number, because 68646620033 - 2⁸ = 68646619777 is a prime.

It is not a weakly prime, because it can be changed into another prime (68646620039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323310016 + 34323310017.

It is an arithmetic number, because the mean of its divisors is an integer number (34323310017).

Almost surely, 2^68646620033 is an apocalyptic number.

It is an amenable number.

68646620033 is a deficient number, since it is larger than the sum of its proper divisors (1).

68646620033 is an equidigital number, since it uses as much as digits as its factorization.

68646620033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 68646620033 in words is "sixty-eight billion, six hundred forty-six million, six hundred twenty thousand, thirty-three".