68165563 has 12 divisors (see below), whose sum is σ = 72943200. Its totient is φ = 63684992.

The previous prime is 68165561. The next prime is 68165611. The reversal of 68165563 is 36556186.

It is not a de Polignac number, because 68165563 - 2¹ = 68165561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68165561) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 42270 + ... + 43852.

It is an arithmetic number, because the mean of its divisors is an integer number (6078600).

Almost surely, 2^68165563 is an apocalyptic number.

68165563 is a deficient number, since it is larger than the sum of its proper divisors (4777637).

68165563 is a wasteful number, since it uses less digits than its factorization.

68165563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1749 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 68165563 is about 8256.2438796344. The cubic root of 68165563 is about 408.4965020348.

The spelling of 68165563 in words is "sixty-eight million, one hundred sixty-five thousand, five hundred sixty-three".