68431866 has 16 divisors (see below), whose sum is σ = 137193888. Its totient is φ = 22755600.

The previous prime is 68431807. The next prime is 68431889. The reversal of 68431866 is 66813486.

It is a happy number.

It is a super-3 number, since 3×68431866³ (a number of 24 digits) contains 333 as substring.

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, 11020 + ... + 16071.

It is an arithmetic number, because the mean of its divisors is an integer number (8574618).

Almost surely, 2^68431866 is an apocalyptic number.

68431866 is an abundant number, since it is smaller than the sum of its proper divisors (68762022).

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

68431866 is a wasteful number, since it uses less digits than its factorization.

68431866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27517.

The product of its digits is 165888, while the sum is 42.

The square root of 68431866 is about 8272.3555291102. The cubic root of 68431866 is about 409.0277697482.

The spelling of 68431866 in words is "sixty-eight million, four hundred thirty-one thousand, eight hundred sixty-six".