68261766 has 64 divisors (see below), whose sum is σ = 153031680. Its totient is φ = 20195840.

The previous prime is 68261729. The next prime is 68261779. The reversal of 68261766 is 66716286.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138781 + ... + 139271.

It is an arithmetic number, because the mean of its divisors is an integer number (2391120).

Almost surely, 2^68261766 is an apocalyptic number.

68261766 is an abundant number, since it is smaller than the sum of its proper divisors (84769914).

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

68261766 is a wasteful number, since it uses less digits than its factorization.

68261766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589.

The product of its digits is 145152, while the sum is 42.

The square root of 68261766 is about 8262.0679009555. The cubic root of 68261766 is about 408.6885839511.

The spelling of 68261766 in words is "sixty-eight million, two hundred sixty-one thousand, seven hundred sixty-six".