68140778 has 16 divisors (see below), whose sum is σ = 106306560. Its totient is φ = 32718000.

The previous prime is 68140763. The next prime is 68140781. The reversal of 68140778 is 87704186.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8003 + ... + 14153.

It is an arithmetic number, because the mean of its divisors is an integer number (6644160).

Almost surely, 2^68140778 is an apocalyptic number.

68140778 is a deficient number, since it is larger than the sum of its proper divisors (38165782).

68140778 is a wasteful number, since it uses less digits than its factorization.

68140778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6373.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 68140778 is about 8254.7427579544. The cubic root of 68140778 is about 408.4469862543.

The spelling of 68140778 in words is "sixty-eight million, one hundred forty thousand, seven hundred seventy-eight".