68908778 has 4 divisors (see below), whose sum is σ = 103363170. Its totient is φ = 34454388.

The previous prime is 68908771. The next prime is 68908781. The reversal of 68908778 is 87780986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57866449 + 11042329 = 7607^2 + 3323^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68908771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17227193 + ... + 17227196.

Almost surely, 2^68908778 is an apocalyptic number.

68908778 is a deficient number, since it is larger than the sum of its proper divisors (34454392).

68908778 is a wasteful number, since it uses less digits than its factorization.

68908778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34454391.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The square root of 68908778 is about 8301.1311277440. The cubic root of 68908778 is about 409.9757629932.

The spelling of 68908778 in words is "sixty-eight million, nine hundred eight thousand, seven hundred seventy-eight".