6633681 has 4 divisors (see below), whose sum is σ = 8844912. Its totient is φ = 4422452.

The previous prime is 6633667. The next prime is 6633701. The reversal of 6633681 is 1863366.

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.

It is a cyclic number.

It is not a de Polignac number, because 6633681 - 2¹⁷ = 6502609 is a prime.

It is a super-2 number, since 2×6633681² = 88011447219522, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (6633661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105611 + ... + 1105616.

It is an arithmetic number, because the mean of its divisors is an integer number (2211228).

Almost surely, 2^6633681 is an apocalyptic number.

It is an amenable number.

6633681 is a deficient number, since it is larger than the sum of its proper divisors (2211231).

6633681 is a wasteful number, since it uses less digits than its factorization.

6633681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211230.

The product of its digits is 15552, while the sum is 33.

The square root of 6633681 is about 2575.5933297009. The cubic root of 6633681 is about 187.8962854075.

The spelling of 6633681 in words is "six million, six hundred thirty-three thousand, six hundred eighty-one".