68757778 has 4 divisors (see below), whose sum is σ = 103136670. Its totient is φ = 34378888.

The previous prime is 68757769. The next prime is 68757823. The reversal of 68757778 is 87775786.

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., 68013009 + 744769 = 8247^2 + 863^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17189443 + ... + 17189446.

Almost surely, 2^68757778 is an apocalyptic number.

68757778 is a deficient number, since it is larger than the sum of its proper divisors (34378892).

68757778 is a wasteful number, since it uses less digits than its factorization.

68757778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34378891.

The product of its digits is 4609920, while the sum is 55.

The square root of 68757778 is about 8292.0309936710. The cubic root of 68757778 is about 409.6760836410.

The spelling of 68757778 in words is "sixty-eight million, seven hundred fifty-seven thousand, seven hundred seventy-eight".