68664878 has 8 divisors (see below), whose sum is σ = 103219272. Its totient is φ = 34258456.

The previous prime is 68664863. The next prime is 68664901. The reversal of 68664878 is 87846686.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35825 + ... + 37692.

It is an arithmetic number, because the mean of its divisors is an integer number (12902409).

Almost surely, 2^68664878 is an apocalyptic number.

68664878 is a deficient number, since it is larger than the sum of its proper divisors (34554394).

68664878 is a wasteful number, since it uses less digits than its factorization.

68664878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73986.

The product of its digits is 3096576, while the sum is 53.

The square root of 68664878 is about 8286.4273363133. The cubic root of 68664878 is about 409.4914933160.

The spelling of 68664878 in words is "sixty-eight million, six hundred sixty-four thousand, eight hundred seventy-eight".