84666563 has 4 divisors (see below), whose sum is σ = 84704928. Its totient is φ = 84628200.

The previous prime is 84666559. The next prime is 84666587. The reversal of 84666563 is 36566648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84666563 - 2² = 84666559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84666503) 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 3 ways as a sum of consecutive naturals, for example, 15656 + ... + 20357.

It is an arithmetic number, because the mean of its divisors is an integer number (21176232).

Almost surely, 2^84666563 is an apocalyptic number.

84666563 is a deficient number, since it is larger than the sum of its proper divisors (38365).

84666563 is a wasteful number, since it uses less digits than its factorization.

84666563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38364.

The product of its digits is 622080, while the sum is 44.

The square root of 84666563 is about 9201.4435280558. The cubic root of 84666563 is about 439.1072860762.

The spelling of 84666563 in words is "eighty-four million, six hundred sixty-six thousand, five hundred sixty-three".