68388777 has 6 divisors (see below), whose sum is σ = 98783802. Its totient is φ = 45592512.

The previous prime is 68388767. The next prime is 68388781. The reversal of 68388777 is 77788386.

It can be written as a sum of positive squares in only one way, i.e., 67420521 + 968256 = 8211^2 + 984^2 .

It is not a de Polignac number, because 68388777 - 2²⁰ = 67340201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68388767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3799368 + ... + 3799385.

It is an arithmetic number, because the mean of its divisors is an integer number (16463967).

Almost surely, 2^68388777 is an apocalyptic number.

It is an amenable number.

68388777 is a deficient number, since it is larger than the sum of its proper divisors (30395025).

68388777 is a wasteful number, since it uses less digits than its factorization.

68388777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7598759 (or 7598756 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 54.

The square root of 68388777 is about 8269.7507217570. The cubic root of 68388777 is about 408.9419018669.

The spelling of 68388777 in words is "sixty-eight million, three hundred eighty-eight thousand, seven hundred seventy-seven".