67662256997 has 2 divisors, whose sum is σ = 67662256998. Its totient is φ = 67662256996.

The previous prime is 67662256993. The next prime is 67662257017. The reversal of 67662256997 is 79965226676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58547545156 + 9114711841 = 241966^2 + 95471^2 .

It is a cyclic number.

It is not a de Polignac number, because 67662256997 - 2² = 67662256993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67662256993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33831128498 + 33831128499.

It is an arithmetic number, because the mean of its divisors is an integer number (33831128499).

Almost surely, 2^67662256997 is an apocalyptic number.

It is an amenable number.

67662256997 is a deficient number, since it is larger than the sum of its proper divisors (1).

67662256997 is an equidigital number, since it uses as much as digits as its factorization.

67662256997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 65.

The spelling of 67662256997 in words is "sixty-seven billion, six hundred sixty-two million, two hundred fifty-six thousand, nine hundred ninety-seven".