66504163 has 16 divisors (see below), whose sum is σ = 75571200. Its totient is φ = 57970080.

The previous prime is 66504149. The next prime is 66504167. The reversal of 66504163 is 36140566.

It is a cyclic number.

It is not a de Polignac number, because 66504163 - 2⁵ = 66504131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66504167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51358 + ... + 52636.

It is an arithmetic number, because the mean of its divisors is an integer number (4723200).

Almost surely, 2^66504163 is an apocalyptic number.

66504163 is a deficient number, since it is larger than the sum of its proper divisors (9067037).

66504163 is a wasteful number, since it uses less digits than its factorization.

66504163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66504163 is about 8155.0084610624. The cubic root of 66504163 is about 405.1504049409.

The spelling of 66504163 in words is "sixty-six million, five hundred four thousand, one hundred sixty-three".