66321063 has 12 divisors (see below), whose sum is σ = 101432448. Its totient is φ = 41613120.

The previous prime is 66321049. The next prime is 66321071. The reversal of 66321063 is 36012366.

It is not a de Polignac number, because 66321063 - 2²⁵ = 32766631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66321023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216583 + ... + 216888.

It is an arithmetic number, because the mean of its divisors is an integer number (8452704).

Almost surely, 2^66321063 is an apocalyptic number.

66321063 is a deficient number, since it is larger than the sum of its proper divisors (35111385).

66321063 is a wasteful number, since it uses less digits than its factorization.

66321063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433494 (or 433491 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 66321063 is about 8143.7744934398. The cubic root of 66321063 is about 404.7782416525.

The spelling of 66321063 in words is "sixty-six million, three hundred twenty-one thousand, sixty-three".