68678817 has 4 divisors (see below), whose sum is σ = 91571760. Its totient is φ = 45785876.

The previous prime is 68678809. The next prime is 68678837. The reversal of 68678817 is 71887686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68678817 - 2³ = 68678809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68678817.

It is not an unprimeable number, because it can be changed into a prime (68678807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11446467 + ... + 11446472.

It is an arithmetic number, because the mean of its divisors is an integer number (22892940).

Almost surely, 2^68678817 is an apocalyptic number.

It is an amenable number.

68678817 is a deficient number, since it is larger than the sum of its proper divisors (22892943).

68678817 is a wasteful number, since it uses less digits than its factorization.

68678817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22892942.

The product of its digits is 903168, while the sum is 51.

The square root of 68678817 is about 8287.2683678037. The cubic root of 68678817 is about 409.5192004248.

The spelling of 68678817 in words is "sixty-eight million, six hundred seventy-eight thousand, eight hundred seventeen".