68507878 has 4 divisors (see below), whose sum is σ = 102761820. Its totient is φ = 34253938.

The previous prime is 68507867. The next prime is 68507953. The reversal of 68507878 is 87870586.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17126968 + ... + 17126971.

It is an arithmetic number, because the mean of its divisors is an integer number (25690455).

Almost surely, 2^68507878 is an apocalyptic number.

68507878 is a deficient number, since it is larger than the sum of its proper divisors (34253942).

68507878 is a wasteful number, since it uses less digits than its factorization.

68507878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34253941.

The product of its (nonzero) digits is 752640, while the sum is 49.

The square root of 68507878 is about 8276.9485923256. The cubic root of 68507878 is about 409.1791588408.

The spelling of 68507878 in words is "sixty-eight million, five hundred seven thousand, eight hundred seventy-eight".