66386336533 has 8 divisors (see below), whose sum is σ = 72434902176. Its totient is φ = 60340011600.

The previous prime is 66386336521. The next prime is 66386336543. The reversal of 66386336533 is 33563368366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66386336533 - 2⁵ = 66386336501 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 (66386336543) 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, 497923 + ... + 617008.

It is an arithmetic number, because the mean of its divisors is an integer number (9054362772).

Almost surely, 2^66386336533 is an apocalyptic number.

It is an amenable number.

66386336533 is a deficient number, since it is larger than the sum of its proper divisors (6048565643).

66386336533 is a wasteful number, since it uses less digits than its factorization.

66386336533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120355.

The product of its digits is 12597120, while the sum is 52.

The spelling of 66386336533 in words is "sixty-six billion, three hundred eighty-six million, three hundred thirty-six thousand, five hundred thirty-three".