666552733 has 24 divisors (see below), whose sum is σ = 875054880. Its totient is φ = 501469920.

The previous prime is 666552727. The next prime is 666552781. The reversal of 666552733 is 337255666.

It is not a de Polignac number, because 666552733 - 2⁵ = 666552701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666552733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666552233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5691 + ... + 36952.

It is an arithmetic number, because the mean of its divisors is an integer number (36460620).

Almost surely, 2^666552733 is an apocalyptic number.

It is an amenable number.

666552733 is a deficient number, since it is larger than the sum of its proper divisors (208502147).

666552733 is a wasteful number, since it uses less digits than its factorization.

666552733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42697 (or 42690 counting only the distinct ones).

The product of its digits is 680400, while the sum is 43.

The square root of 666552733 is about 25817.6825644751. The cubic root of 666552733 is about 873.5306967883.

The spelling of 666552733 in words is "six hundred sixty-six million, five hundred fifty-two thousand, seven hundred thirty-three".