331666007633 has 4 divisors (see below), whose sum is σ = 332605571748. Its totient is φ = 330726443520.

The previous prime is 331666007509. The next prime is 331666007639. The reversal of 331666007633 is 336700666133.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130358546704 + 201307460929 = 361052^2 + 448673^2 .

It is a cyclic number.

It is not a de Polignac number, because 331666007633 - 2⁸ = 331666007377 is a prime.

It is a super-2 number, since 2×331666007633² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331666007639) 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, 469781528 + ... + 469782233.

It is an arithmetic number, because the mean of its divisors is an integer number (83151392937).

Almost surely, 2^331666007633 is an apocalyptic number.

It is an amenable number.

331666007633 is a deficient number, since it is larger than the sum of its proper divisors (939564115).

331666007633 is an equidigital number, since it uses as much as digits as its factorization.

331666007633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939564114.

The product of its (nonzero) digits is 734832, while the sum is 44.

The spelling of 331666007633 in words is "three hundred thirty-one billion, six hundred sixty-six million, seven thousand, six hundred thirty-three".