68818766 has 4 divisors (see below), whose sum is σ = 103228152. Its totient is φ = 34409382.

The previous prime is 68818747. The next prime is 68818781. The reversal of 68818766 is 66781886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66781886 = 2 ⋅33390943.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17204690 + ... + 17204693.

It is an arithmetic number, because the mean of its divisors is an integer number (25807038).

Almost surely, 2^68818766 is an apocalyptic number.

68818766 is a deficient number, since it is larger than the sum of its proper divisors (34409386).

68818766 is a wasteful number, since it uses less digits than its factorization.

68818766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34409385.

The product of its digits is 774144, while the sum is 50.

The square root of 68818766 is about 8295.7076853033. The cubic root of 68818766 is about 409.7971751114.

The spelling of 68818766 in words is "sixty-eight million, eight hundred eighteen thousand, seven hundred sixty-six".