68077687 has 6 divisors (see below), whose sum is σ = 68618624. Its totient is φ = 67540980.

The previous prime is 68077637. The next prime is 68077693. The reversal of 68077687 is 78677086.

It is not a de Polignac number, because 68077687 - 2¹⁵ = 68044919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68077687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68077637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15178 + ... + 19144.

Almost surely, 2^68077687 is an apocalyptic number.

68077687 is a deficient number, since it is larger than the sum of its proper divisors (540937).

68077687 is an equidigital number, since it uses as much as digits as its factorization.

68077687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229 (or 4098 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The square root of 68077687 is about 8250.9203729039. The cubic root of 68077687 is about 408.3208880653.

The spelling of 68077687 in words is "sixty-eight million, seventy-seven thousand, six hundred eighty-seven".