68771785 has 4 divisors (see below), whose sum is σ = 82526148. Its totient is φ = 55017424.

The previous prime is 68771777. The next prime is 68771797. The reversal of 68771785 is 58717786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43731769 + 25040016 = 6613^2 + 5004^2 .

It is a cyclic number.

It is not a de Polignac number, because 68771785 - 2³ = 68771777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6877174 + ... + 6877183.

It is an arithmetic number, because the mean of its divisors is an integer number (20631537).

Almost surely, 2^68771785 is an apocalyptic number.

It is an amenable number.

68771785 is a deficient number, since it is larger than the sum of its proper divisors (13754363).

68771785 is a wasteful number, since it uses less digits than its factorization.

68771785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13754362.

The product of its digits is 658560, while the sum is 49.

The square root of 68771785 is about 8292.8755567656. The cubic root of 68771785 is about 409.7039008250.

The spelling of 68771785 in words is "sixty-eight million, seven hundred seventy-one thousand, seven hundred eighty-five".