66316533 has 32 divisors (see below), whose sum is σ = 96092160. Its totient is φ = 40582080.

The previous prime is 66316529. The next prime is 66316559. The reversal of 66316533 is 33561366.

It is not a de Polignac number, because 66316533 - 2² = 66316529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66316494 and 66316503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66316513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180516 + ... + 180882.

It is an arithmetic number, because the mean of its divisors is an integer number (3002880).

Almost surely, 2^66316533 is an apocalyptic number.

It is an amenable number.

66316533 is a deficient number, since it is larger than the sum of its proper divisors (29775627).

66316533 is a wasteful number, since it uses less digits than its factorization.

66316533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497.

The product of its digits is 29160, while the sum is 33.

The square root of 66316533 is about 8143.4963621285. The cubic root of 66316533 is about 404.7690254392.

Adding to 66316533 its reverse (33561366), we get a palindrome (99877899).

The spelling of 66316533 in words is "sixty-six million, three hundred sixteen thousand, five hundred thirty-three".