68366778 has 16 divisors (see below), whose sum is σ = 136839456. Its totient is φ = 22771280.

The previous prime is 68366773. The next prime is 68366789. The reversal of 68366778 is 87766386.

It is a self number, because there is not a number n which added to its sum of digits gives 68366778.

It is not an unprimeable number, because it can be changed into a prime (68366773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5800 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (8552466).

Almost surely, 2^68366778 is an apocalyptic number.

68366778 is an abundant number, since it is smaller than the sum of its proper divisors (68472678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68366778 is a wasteful number, since it uses less digits than its factorization.

68366778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8829.

The product of its digits is 2032128, while the sum is 51.

The square root of 68366778 is about 8268.4205263158. The cubic root of 68366778 is about 408.8980482889.

The spelling of 68366778 in words is "sixty-eight million, three hundred sixty-six thousand, seven hundred seventy-eight".