68366791 has 2 divisors, whose sum is σ = 68366792. Its totient is φ = 68366790.

The previous prime is 68366789. The next prime is 68366821. The reversal of 68366791 is 19766386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68366791 - 2¹ = 68366789 is a prime.

It is a super-2 number, since 2×68366791² = 9348036223275362, which contains 22 as substring.

Together with 68366789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68366591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34183395 + 34183396.

It is an arithmetic number, because the mean of its divisors is an integer number (34183396).

Almost surely, 2^68366791 is an apocalyptic number.

68366791 is a deficient number, since it is larger than the sum of its proper divisors (1).

68366791 is an equidigital number, since it uses as much as digits as its factorization.

68366791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 68366791 is about 8268.4213124393. The cubic root of 68366791 is about 408.8980742063.

The spelling of 68366791 in words is "sixty-eight million, three hundred sixty-six thousand, seven hundred ninety-one".