6631549 has 4 divisors (see below), whose sum is σ = 6646336. Its totient is φ = 6616764.

The previous prime is 6631501. The next prime is 6631553. The reversal of 6631549 is 9451366.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9451366 = 2 ⋅4725683.

It is a cyclic number.

It is not a de Polignac number, because 6631549 - 2⁷ = 6631421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6631579) 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, 6699 + ... + 7624.

It is an arithmetic number, because the mean of its divisors is an integer number (1661584).

It is a Poulet number, since it divides 2^6631548-1.

Almost surely, 2^6631549 is an apocalyptic number.

It is an amenable number.

6631549 is a deficient number, since it is larger than the sum of its proper divisors (14787).

6631549 is a wasteful number, since it uses less digits than its factorization.

6631549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14786.

The product of its digits is 19440, while the sum is 34.

The square root of 6631549 is about 2575.1794112256. The cubic root of 6631549 is about 187.8761539097.

The spelling of 6631549 in words is "six million, six hundred thirty-one thousand, five hundred forty-nine".