66564163 has 8 divisors (see below), whose sum is σ = 74189520. Its totient is φ = 59351040.

The previous prime is 66564143. The next prime is 66564167. The reversal of 66564163 is 36146566.

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 66564163 - 2¹³ = 66555971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66564167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102718 + ... + 103363.

It is an arithmetic number, because the mean of its divisors is an integer number (9273690).

Almost surely, 2^66564163 is an apocalyptic number.

66564163 is a deficient number, since it is larger than the sum of its proper divisors (7625357).

66564163 is a wasteful number, since it uses less digits than its factorization.

66564163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206117.

The product of its digits is 77760, while the sum is 37.

The square root of 66564163 is about 8158.6863525938. The cubic root of 66564163 is about 405.2722104357.

The spelling of 66564163 in words is "sixty-six million, five hundred sixty-four thousand, one hundred sixty-three".