68787775 has 12 divisors (see below), whose sum is σ = 97482352. Its totient is φ = 47168640.

The previous prime is 68787769. The next prime is 68787781. The reversal of 68787775 is 57778786.

It is an interprime number because it is at equal distance from previous prime (68787769) and next prime (68787781).

It is not a de Polignac number, because 68787775 - 2⁹ = 68787263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 196362 + ... + 196711.

Almost surely, 2^68787775 is an apocalyptic number.

68787775 is a deficient number, since it is larger than the sum of its proper divisors (28694577).

68787775 is a wasteful number, since it uses less digits than its factorization.

68787775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393090 (or 393085 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 55.

The square root of 68787775 is about 8293.8395812796. The cubic root of 68787775 is about 409.7356515287.

The spelling of 68787775 in words is "sixty-eight million, seven hundred eighty-seven thousand, seven hundred seventy-five".