68664499446737 has 2 divisors, whose sum is σ = 68664499446738. Its totient is φ = 68664499446736.

The previous prime is 68664499446559. The next prime is 68664499446773. The reversal of 68664499446737 is 73764499446686.

Together with next prime (68664499446773) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63794868634561 + 4869630812176 = 7987169^2 + 2206724^2 .

It is a cyclic number.

It is not a de Polignac number, because 68664499446737 - 2²² = 68664495252433 is a prime.

It is not a weakly prime, because it can be changed into another prime (68664499448737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34332249723368 + 34332249723369.

It is an arithmetic number, because the mean of its divisors is an integer number (34332249723369).

Almost surely, 2^{68664499446737} is an apocalyptic number.

It is an amenable number.

68664499446737 is a deficient number, since it is larger than the sum of its proper divisors (1).

68664499446737 is an equidigital number, since it uses as much as digits as its factorization.

68664499446737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31603654656, while the sum is 83.

The spelling of 68664499446737 in words is "sixty-eight trillion, six hundred sixty-four billion, four hundred ninety-nine million, four hundred forty-six thousand, seven hundred thirty-seven".