67768871 has 2 divisors, whose sum is σ = 67768872. Its totient is φ = 67768870.

The previous prime is 67768843. The next prime is 67768889. The reversal of 67768871 is 17886776.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67768871 is a prime.

It is a super-2 number, since 2×67768871² = 9185239753229282, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67768891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33884435 + 33884436.

It is an arithmetic number, because the mean of its divisors is an integer number (33884436).

Almost surely, 2^67768871 is an apocalyptic number.

67768871 is a deficient number, since it is larger than the sum of its proper divisors (1).

67768871 is an equidigital number, since it uses as much as digits as its factorization.

67768871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 50.

The square root of 67768871 is about 8232.1850683764. The cubic root of 67768871 is about 407.7025397355.

The spelling of 67768871 in words is "sixty-seven million, seven hundred sixty-eight thousand, eight hundred seventy-one".