68778158 has 16 divisors (see below), whose sum is σ = 109394064. Its totient is φ = 32319360.

The previous prime is 68778133. The next prime is 68778163. The reversal of 68778158 is 85187786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37073 + ... + 38883.

It is an arithmetic number, because the mean of its divisors is an integer number (6837129).

Almost surely, 2^68778158 is an apocalyptic number.

68778158 is a deficient number, since it is larger than the sum of its proper divisors (40615906).

68778158 is a wasteful number, since it uses less digits than its factorization.

68778158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947.

The product of its digits is 752640, while the sum is 50.

The square root of 68778158 is about 8293.2597933503. The cubic root of 68778158 is about 409.7165560261.

The spelling of 68778158 in words is "sixty-eight million, seven hundred seventy-eight thousand, one hundred fifty-eight".