68778507 has 12 divisors (see below), whose sum is σ = 106677096. Its totient is φ = 39301920.

The previous prime is 68778473. The next prime is 68778509. The reversal of 68778507 is 70587786.

It is not a de Polignac number, because 68778507 - 2¹⁰ = 68777483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68778509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233794 + ... + 234087.

It is an arithmetic number, because the mean of its divisors is an integer number (8889758).

Almost surely, 2^68778507 is an apocalyptic number.

68778507 is a deficient number, since it is larger than the sum of its proper divisors (37898589).

68778507 is a wasteful number, since it uses less digits than its factorization.

68778507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467898 (or 467891 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 68778507 is about 8293.2808345069. The cubic root of 68778507 is about 409.7172490312.

The spelling of 68778507 in words is "sixty-eight million, seven hundred seventy-eight thousand, five hundred seven".