666604607033 has 16 divisors (see below), whose sum is σ = 675051812880. Its totient is φ = 658221686784.

The previous prime is 666604607021. The next prime is 666604607059. The reversal of 666604607033 is 330706406666.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2488812544 + 664115794489 = 49888^2 + 814933^2 .

It is a cyclic number.

It is not a de Polignac number, because 666604607033 - 2⁴ = 666604607017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (666604607063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20451173 + ... + 20483741.

It is an arithmetic number, because the mean of its divisors is an integer number (42190738305).

Almost surely, 2^666604607033 is an apocalyptic number.

It is an amenable number.

666604607033 is a deficient number, since it is larger than the sum of its proper divisors (8447205847).

666604607033 is a wasteful number, since it uses less digits than its factorization.

666604607033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33548.

The product of its (nonzero) digits is 1959552, while the sum is 47.

The spelling of 666604607033 in words is "six hundred sixty-six billion, six hundred four million, six hundred seven thousand, thirty-three".