68366521 has 8 divisors (see below), whose sum is σ = 69413120. Its totient is φ = 67324608.

The previous prime is 68366483. The next prime is 68366527. The reversal of 68366521 is 12566386.

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

It is a cyclic number.

It is not a de Polignac number, because 68366521 - 2²¹ = 66269369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68366527) 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 7 ways as a sum of consecutive naturals, for example, 37585 + ... + 39361.

It is an arithmetic number, because the mean of its divisors is an integer number (8676640).

Almost surely, 2^68366521 is an apocalyptic number.

It is an amenable number.

68366521 is a deficient number, since it is larger than the sum of its proper divisors (1046599).

68366521 is a wasteful number, since it uses less digits than its factorization.

68366521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2343.

The product of its digits is 51840, while the sum is 37.

The square root of 68366521 is about 8268.4049852435. The cubic root of 68366521 is about 408.8975359205.

The spelling of 68366521 in words is "sixty-eight million, three hundred sixty-six thousand, five hundred twenty-one".