68806818 has 12 divisors (see below), whose sum is σ = 149081478. Its totient is φ = 22935600.

The previous prime is 68806817. The next prime is 68806819. The reversal of 68806818 is 81860886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68806817) and next prime (68806819).

It can be written as a sum of positive squares in only one way, i.e., 35247969 + 33558849 = 5937^2 + 5793^2 .

It is not an unprimeable number, because it can be changed into a prime (68806811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1911283 + ... + 1911318.

Almost surely, 2^68806818 is an apocalyptic number.

68806818 is an abundant number, since it is smaller than the sum of its proper divisors (80274660).

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

68806818 is a wasteful number, since it uses less digits than its factorization.

68806818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3822609 (or 3822606 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 68806818 is about 8294.9875225946. The cubic root of 68806818 is about 409.7734580339.

The spelling of 68806818 in words is "sixty-eight million, eight hundred six thousand, eight hundred eighteen".