68566679 has 4 divisors (see below), whose sum is σ = 68610600. Its totient is φ = 68522760.

The previous prime is 68566651. The next prime is 68566691. The reversal of 68566679 is 97666586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68566679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68566679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68566609) 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, 19529 + ... + 22770.

It is an arithmetic number, because the mean of its divisors is an integer number (17152650).

Almost surely, 2^68566679 is an apocalyptic number.

68566679 is a deficient number, since it is larger than the sum of its proper divisors (43921).

68566679 is a wasteful number, since it uses less digits than its factorization.

68566679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43920.

The product of its digits is 3265920, while the sum is 53.

The square root of 68566679 is about 8280.4999245215. The cubic root of 68566679 is about 409.2961928911.

The spelling of 68566679 in words is "sixty-eight million, five hundred sixty-six thousand, six hundred seventy-nine".