68188660 has 24 divisors (see below), whose sum is σ = 145625760. Its totient is φ = 26812704.

The previous prime is 68188651. The next prime is 68188697. The reversal of 68188660 is 6688186.

It is a happy number.

It is a congruent number.

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, 27714 + ... + 30073.

It is an arithmetic number, because the mean of its divisors is an integer number (6067740).

Almost surely, 2^68188660 is an apocalyptic number.

It is an amenable number.

68188660 is an abundant number, since it is smaller than the sum of its proper divisors (77437100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68188660 is a wasteful number, since it uses less digits than its factorization.

68188660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57855 (or 57853 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 68188660 is about 8257.6425207198. The cubic root of 68188660 is about 408.5426347047.

The spelling of 68188660 in words is "sixty-eight million, one hundred eighty-eight thousand, six hundred sixty".