6631749 has 12 divisors (see below), whose sum is σ = 9909900. Its totient is φ = 4268544.

The previous prime is 6631739. The next prime is 6631763. The reversal of 6631749 is 9471366.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 4809249 = 1350^2 + 2193^2 .

It is not a de Polignac number, because 6631749 - 2⁴ = 6631733 is a prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6631739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12444 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (825825).

Almost surely, 2^6631749 is an apocalyptic number.

It is an amenable number.

6631749 is a deficient number, since it is larger than the sum of its proper divisors (3278151).

6631749 is a wasteful number, since it uses less digits than its factorization.

6631749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25444 (or 25441 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 6631749 is about 2575.2182431786. The cubic root of 6631749 is about 187.8780426013.

It can be divided in two parts, 66317 and 49, that added together give a palindrome (66366).

The spelling of 6631749 in words is "six million, six hundred thirty-one thousand, seven hundred forty-nine".