68715866 has 8 divisors (see below), whose sum is σ = 104315904. Its totient is φ = 33943900.

The previous prime is 68715733. The next prime is 68715869. The reversal of 68715866 is 66851786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68715866.

It is not an unprimeable number, because it can be changed into a prime (68715869) 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, 206810 + ... + 207141.

It is an arithmetic number, because the mean of its divisors is an integer number (13039488).

Almost surely, 2^68715866 is an apocalyptic number.

68715866 is a deficient number, since it is larger than the sum of its proper divisors (35600038).

68715866 is a wasteful number, since it uses less digits than its factorization.

68715866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414036.

The product of its digits is 483840, while the sum is 47.

The square root of 68715866 is about 8289.5033626871. The cubic root of 68715866 is about 409.5928259865.

The spelling of 68715866 in words is "sixty-eight million, seven hundred fifteen thousand, eight hundred sixty-six".