666536333 has 4 divisors (see below), whose sum is σ = 666589500. Its totient is φ = 666483168.

The previous prime is 666536327. The next prime is 666536341. The reversal of 666536333 is 333635666.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 276789769 + 389746564 = 16637^2 + 19742^2 .

It is a cyclic number.

It is not a de Polignac number, because 666536333 - 2²⁶ = 599427469 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 (666533333) 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, 3791 + ... + 36707.

It is an arithmetic number, because the mean of its divisors is an integer number (166647375).

Almost surely, 2^666536333 is an apocalyptic number.

It is an amenable number.

666536333 is a deficient number, since it is larger than the sum of its proper divisors (53167).

666536333 is a wasteful number, since it uses less digits than its factorization.

666536333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53166.

The product of its digits is 524880, while the sum is 41.

The square root of 666536333 is about 25817.3649507458. The cubic root of 666536333 is about 873.5235325535.

The spelling of 666536333 in words is "six hundred sixty-six million, five hundred thirty-six thousand, three hundred thirty-three".