666734533 has 4 divisors (see below), whose sum is σ = 666793600. Its totient is φ = 666675468.

The previous prime is 666734513. The next prime is 666734539. The reversal of 666734533 is 335437666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 666734533 - 2⁵ = 666734501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 666734533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666734539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6735 + ... + 37132.

It is an arithmetic number, because the mean of its divisors is an integer number (166698400).

Almost surely, 2^666734533 is an apocalyptic number.

It is an amenable number.

666734533 is a deficient number, since it is larger than the sum of its proper divisors (59067).

666734533 is a wasteful number, since it uses less digits than its factorization.

666734533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59066.

The product of its digits is 816480, while the sum is 43.

The square root of 666734533 is about 25821.2031671648. The cubic root of 666734533 is about 873.6101070820.

The spelling of 666734533 in words is "six hundred sixty-six million, seven hundred thirty-four thousand, five hundred thirty-three".