67935775997 has 2 divisors, whose sum is σ = 67935775998. Its totient is φ = 67935775996.

The previous prime is 67935775969. The next prime is 67935776009. The reversal of 67935775997 is 79957753976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53814256441 + 14121519556 = 231979^2 + 118834^2 .

It is a cyclic number.

It is not a de Polignac number, because 67935775997 - 2⁸ = 67935775741 is a prime.

It is a super-2 number, since 2×67935775997² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67935775937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33967887998 + 33967887999.

It is an arithmetic number, because the mean of its divisors is an integer number (33967887999).

Almost surely, 2^67935775997 is an apocalyptic number.

It is an amenable number.

67935775997 is a deficient number, since it is larger than the sum of its proper divisors (1).

67935775997 is an equidigital number, since it uses as much as digits as its factorization.

67935775997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787648050, while the sum is 74.

The spelling of 67935775997 in words is "sixty-seven billion, nine hundred thirty-five million, seven hundred seventy-five thousand, nine hundred ninety-seven".