67779516839 has 2 divisors, whose sum is σ = 67779516840. Its totient is φ = 67779516838.

The previous prime is 67779516811. The next prime is 67779516859. The reversal of 67779516839 is 93861597776.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67779516839 - 2⁸ = 67779516583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67779516859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33889758419 + 33889758420.

It is an arithmetic number, because the mean of its divisors is an integer number (33889758420).

Almost surely, 2^67779516839 is an apocalyptic number.

67779516839 is a deficient number, since it is larger than the sum of its proper divisors (1).

67779516839 is an equidigital number, since it uses as much as digits as its factorization.

67779516839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120022560, while the sum is 68.

The spelling of 67779516839 in words is "sixty-seven billion, seven hundred seventy-nine million, five hundred sixteen thousand, eight hundred thirty-nine".