68616679 has 2 divisors, whose sum is σ = 68616680. Its totient is φ = 68616678.

The previous prime is 68616589. The next prime is 68616689. The reversal of 68616679 is 97661686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68616679 - 2⁷ = 68616551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68616689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34308339 + 34308340.

It is an arithmetic number, because the mean of its divisors is an integer number (34308340).

Almost surely, 2^68616679 is an apocalyptic number.

68616679 is a deficient number, since it is larger than the sum of its proper divisors (1).

68616679 is an equidigital number, since it uses as much as digits as its factorization.

68616679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 68616679 is about 8283.5185157033. The cubic root of 68616679 is about 409.3956573225.

The spelling of 68616679 in words is "sixty-eight million, six hundred sixteen thousand, six hundred seventy-nine".