6631738033 has 4 divisors (see below), whose sum is σ = 6638877540. Its totient is φ = 6624598528.

The previous prime is 6631738027. The next prime is 6631738103. The reversal of 6631738033 is 3308371366.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3308371366 = 2 ⋅1654185683.

It can be written as a sum of positive squares in 2 ways, for example, as 1722914064 + 4908823969 = 41508^2 + 70063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6631738033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6631738133) 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, 3568360 + ... + 3570217.

It is an arithmetic number, because the mean of its divisors is an integer number (1659719385).

Almost surely, 2^6631738033 is an apocalyptic number.

It is an amenable number.

6631738033 is a deficient number, since it is larger than the sum of its proper divisors (7139507).

6631738033 is an equidigital number, since it uses as much as digits as its factorization.

6631738033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139506.

The product of its (nonzero) digits is 163296, while the sum is 40.

The square root of 6631738033 is about 81435.4838691341. The cubic root of 6631738033 is about 1878.7793903586.

The spelling of 6631738033 in words is "six billion, six hundred thirty-one million, seven hundred thirty-eight thousand, thirty-three".