68221864 has 32 divisors (see below), whose sum is σ = 134835840. Its totient is φ = 32296000.

The previous prime is 68221861. The next prime is 68221871. The reversal of 68221864 is 46812286.

It is not an unprimeable number, because it can be changed into a prime (68221861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16749 + ... + 20419.

It is an arithmetic number, because the mean of its divisors is an integer number (4213620).

Almost surely, 2^68221864 is an apocalyptic number.

It is an amenable number.

68221864 is a deficient number, since it is larger than the sum of its proper divisors (66613976).

68221864 is a wasteful number, since it uses less digits than its factorization.

68221864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801 (or 3797 counting only the distinct ones).

The product of its digits is 36864, while the sum is 37.

The square root of 68221864 is about 8259.6527772056. The cubic root of 68221864 is about 408.6089362882.

The spelling of 68221864 in words is "sixty-eight million, two hundred twenty-one thousand, eight hundred sixty-four".