68626978 has 16 divisors (see below), whose sum is σ = 117768384. Its totient is φ = 29381040.

The previous prime is 68626969. The next prime is 68626979. The reversal of 68626978 is 87962686.

It is not an unprimeable number, because it can be changed into a prime (68626979) 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, 16176 + ... + 19972.

It is an arithmetic number, because the mean of its divisors is an integer number (7360524).

Almost surely, 2^68626978 is an apocalyptic number.

68626978 is a deficient number, since it is larger than the sum of its proper divisors (49141406).

68626978 is a wasteful number, since it uses less digits than its factorization.

68626978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5097.

The product of its digits is 1741824, while the sum is 52.

The square root of 68626978 is about 8284.1401485006. The cubic root of 68626978 is about 409.4161390042.

The spelling of 68626978 in words is "sixty-eight million, six hundred twenty-six thousand, nine hundred seventy-eight".