68666683 has 2 divisors, whose sum is σ = 68666684. Its totient is φ = 68666682.

The previous prime is 68666681. The next prime is 68666687. The reversal of 68666683 is 38666686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68666683 - 2¹ = 68666681 is a prime.

It is a super-2 number, since 2×68666683² = 9430226708444978, which contains 22 as substring.

Together with 68666681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68666681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34333341 + 34333342.

It is an arithmetic number, because the mean of its divisors is an integer number (34333342).

Almost surely, 2^68666683 is an apocalyptic number.

68666683 is a deficient number, since it is larger than the sum of its proper divisors (1).

68666683 is an equidigital number, since it uses as much as digits as its factorization.

68666683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The square root of 68666683 is about 8286.5362486385. The cubic root of 68666683 is about 409.4950813982.

The spelling of 68666683 in words is "sixty-eight million, six hundred sixty-six thousand, six hundred eighty-three".