68266187 has 4 divisors (see below), whose sum is σ = 74472216. Its totient is φ = 62060160.

The previous prime is 68266157. The next prime is 68266201. The reversal of 68266187 is 78166286.

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

It is a cyclic number.

It is not a de Polignac number, because 68266187 - 2¹⁰ = 68265163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68266117) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3102998 + ... + 3103019.

It is an arithmetic number, because the mean of its divisors is an integer number (18618054).

Almost surely, 2^68266187 is an apocalyptic number.

68266187 is a deficient number, since it is larger than the sum of its proper divisors (6206029).

68266187 is a wasteful number, since it uses less digits than its factorization.

68266187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6206028.

The product of its digits is 193536, while the sum is 44.

The square root of 68266187 is about 8262.3354446549. The cubic root of 68266187 is about 408.6974067194.

Subtracting 68266187 from its reverse (78166286), we obtain a palindrome (9900099).

The spelling of 68266187 in words is "sixty-eight million, two hundred sixty-six thousand, one hundred eighty-seven".