66333663 has 12 divisors (see below), whose sum is σ = 104525928. Its totient is φ = 40202160.

The previous prime is 66333647. The next prime is 66333671. The reversal of 66333663 is 36633366.

It is not a de Polignac number, because 66333663 - 2⁴ = 66333647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66333623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334920 + ... + 335117.

It is an arithmetic number, because the mean of its divisors is an integer number (8710494).

Almost surely, 2^66333663 is an apocalyptic number.

66333663 is a deficient number, since it is larger than the sum of its proper divisors (38192265).

66333663 is a wasteful number, since it uses less digits than its factorization.

66333663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670054 (or 670051 counting only the distinct ones).

The product of its digits is 104976, while the sum is 36.

The square root of 66333663 is about 8144.5480537596. The cubic root of 66333663 is about 404.8038739461.

It can be divided in two parts, 6633 and 3663, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 66333663 in words is "sixty-six million, three hundred thirty-three thousand, six hundred sixty-three".