68990296667 has 2 divisors, whose sum is σ = 68990296668. Its totient is φ = 68990296666.

The previous prime is 68990296643. The next prime is 68990296673. The reversal of 68990296667 is 76669209986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68990296667 - 2¹² = 68990292571 is a prime.

It is a super-2 number, since 2×68990296667² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68990296597 and 68990296606.

It is not a weakly prime, because it can be changed into another prime (68990290667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34495148333 + 34495148334.

It is an arithmetic number, because the mean of its divisors is an integer number (34495148334).

Almost surely, 2^68990296667 is an apocalyptic number.

68990296667 is a deficient number, since it is larger than the sum of its proper divisors (1).

68990296667 is an equidigital number, since it uses as much as digits as its factorization.

68990296667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105815808, while the sum is 68.

The spelling of 68990296667 in words is "sixty-eight billion, nine hundred ninety million, two hundred ninety-six thousand, six hundred sixty-seven".