68204266687 has 2 divisors, whose sum is σ = 68204266688. Its totient is φ = 68204266686.

The previous prime is 68204266661. The next prime is 68204266727. The reversal of 68204266687 is 78666240286.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68204266687 is a prime.

It is a super-2 number, since 2×68204266687² (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 (68204266607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34102133343 + 34102133344.

It is an arithmetic number, because the mean of its divisors is an integer number (34102133344).

Almost surely, 2^68204266687 is an apocalyptic number.

68204266687 is a deficient number, since it is larger than the sum of its proper divisors (1).

68204266687 is an equidigital number, since it uses as much as digits as its factorization.

68204266687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 68204266687 in words is "sixty-eight billion, two hundred four million, two hundred sixty-six thousand, six hundred eighty-seven".