68768818 has 4 divisors (see below), whose sum is σ = 103153230. Its totient is φ = 34384408.

The previous prime is 68768813. The next prime is 68768837. The reversal of 68768818 is 81886786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81886786 = 2 ⋅40943393.

It can be written as a sum of positive squares in only one way, i.e., 46744569 + 22024249 = 6837^2 + 4693^2 .

It is not an unprimeable number, because it can be changed into a prime (68768813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17192203 + ... + 17192206.

Almost surely, 2^68768818 is an apocalyptic number.

68768818 is a deficient number, since it is larger than the sum of its proper divisors (34384412).

68768818 is a wasteful number, since it uses less digits than its factorization.

68768818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34384411.

The product of its digits is 1032192, while the sum is 52.

The square root of 68768818 is about 8292.6966663444. The cubic root of 68768818 is about 409.6980088304.

The spelling of 68768818 in words is "sixty-eight million, seven hundred sixty-eight thousand, eight hundred eighteen".