68811663 has 4 divisors (see below), whose sum is σ = 91748888. Its totient is φ = 45874440.

The previous prime is 68811647. The next prime is 68811667. The reversal of 68811663 is 36611886.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68811663 - 2⁴ = 68811647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68811667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11468608 + ... + 11468613.

It is an arithmetic number, because the mean of its divisors is an integer number (22937222).

Almost surely, 2^68811663 is an apocalyptic number.

68811663 is a deficient number, since it is larger than the sum of its proper divisors (22937225).

68811663 is a wasteful number, since it uses less digits than its factorization.

68811663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22937224.

The product of its digits is 41472, while the sum is 39.

The square root of 68811663 is about 8295.2795612927. The cubic root of 68811663 is about 409.7830758104.

The spelling of 68811663 in words is "sixty-eight million, eight hundred eleven thousand, six hundred sixty-three".