68810866 has 8 divisors (see below), whose sum is σ = 109287900. Its totient is φ = 32381568.

The previous prime is 68810839. The next prime is 68810891. The reversal of 68810866 is 66801886.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68475625 + 335241 = 8275^2 + 579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011891 + ... + 1011958.

Almost surely, 2^68810866 is an apocalyptic number.

68810866 is a deficient number, since it is larger than the sum of its proper divisors (40477034).

68810866 is a wasteful number, since it uses less digits than its factorization.

68810866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023868.

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

The square root of 68810866 is about 8295.2315217841. The cubic root of 68810866 is about 409.7814937222.

The spelling of 68810866 in words is "sixty-eight million, eight hundred ten thousand, eight hundred sixty-six".