66000063 has 4 divisors (see below), whose sum is σ = 88000088. Its totient is φ = 44000040.

The previous prime is 66000049. The next prime is 66000071. The reversal of 66000063 is 36000066.

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

It is not a de Polignac number, because 66000063 - 2⁴ = 66000047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66000013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11000008 + ... + 11000013.

It is an arithmetic number, because the mean of its divisors is an integer number (22000022).

Almost surely, 2^66000063 is an apocalyptic number.

66000063 is a deficient number, since it is larger than the sum of its proper divisors (22000025).

66000063 is a wasteful number, since it uses less digits than its factorization.

66000063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22000024.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 66000063 is about 8124.0422820170. The cubic root of 66000063 is about 404.1241306471.

The spelling of 66000063 in words is "sixty-six million, sixty-three", and thus it is an aban number and an uban number.