68778351 has 6 divisors (see below), whose sum is σ = 99346520. Its totient is φ = 45852228.

The previous prime is 68778331. The next prime is 68778377. The reversal of 68778351 is 15387786.

It is not a de Polignac number, because 68778351 - 2⁵ = 68778319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68778297 and 68778306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68778331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3821011 + ... + 3821028.

Almost surely, 2^68778351 is an apocalyptic number.

68778351 is a deficient number, since it is larger than the sum of its proper divisors (30568169).

68778351 is a wasteful number, since it uses less digits than its factorization.

68778351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7642045 (or 7642042 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 68778351 is about 8293.2714292974. The cubic root of 68778351 is about 409.7169392642.

The spelling of 68778351 in words is "sixty-eight million, seven hundred seventy-eight thousand, three hundred fifty-one".