68216678 has 32 divisors (see below), whose sum is σ = 109790208. Its totient is φ = 31730400.

The previous prime is 68216651. The next prime is 68216683. The reversal of 68216678 is 87661286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 300401 + ... + 300627.

It is an arithmetic number, because the mean of its divisors is an integer number (3430944).

Almost surely, 2^68216678 is an apocalyptic number.

68216678 is a deficient number, since it is larger than the sum of its proper divisors (41573530).

68216678 is a wasteful number, since it uses less digits than its factorization.

68216678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428.

The product of its digits is 193536, while the sum is 44.

The square root of 68216678 is about 8259.3388355243. The cubic root of 68216678 is about 408.5985823268.

The spelling of 68216678 in words is "sixty-eight million, two hundred sixteen thousand, six hundred seventy-eight".