68078817 has 6 divisors (see below), whose sum is σ = 98336082. Its totient is φ = 45385872.

The previous prime is 68078809. The next prime is 68078831. The reversal of 68078817 is 71887086.

It can be written as a sum of positive squares in only one way, i.e., 67174416 + 904401 = 8196^2 + 951^2 .

It is not a de Polignac number, because 68078817 - 2³ = 68078809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68078117) 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, 3782148 + ... + 3782165.

It is an arithmetic number, because the mean of its divisors is an integer number (16389347).

Almost surely, 2^68078817 is an apocalyptic number.

It is an amenable number.

68078817 is a deficient number, since it is larger than the sum of its proper divisors (30257265).

68078817 is a wasteful number, since it uses less digits than its factorization.

68078817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564319 (or 7564316 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 68078817 is about 8250.9888498288. The cubic root of 68078817 is about 408.3231472493.

It can be divided in two parts, 680 and 78817, that added together give a palindrome (79497).

The spelling of 68078817 in words is "sixty-eight million, seventy-eight thousand, eight hundred seventeen".