67665676679 has 2 divisors, whose sum is σ = 67665676680. Its totient is φ = 67665676678.

The previous prime is 67665676669. The next prime is 67665676739. The reversal of 67665676679 is 97667656676.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67665676679 - 2²⁴ = 67648899463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67665676669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33832838339 + 33832838340.

It is an arithmetic number, because the mean of its divisors is an integer number (33832838340).

Almost surely, 2^67665676679 is an apocalyptic number.

67665676679 is a deficient number, since it is larger than the sum of its proper divisors (1).

67665676679 is an equidigital number, since it uses as much as digits as its factorization.

67665676679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720135360, while the sum is 71.

The spelling of 67665676679 in words is "sixty-seven billion, six hundred sixty-five million, six hundred seventy-six thousand, six hundred seventy-nine".