6613631 has 2 divisors, whose sum is σ = 6613632. Its totient is φ = 6613630.

The previous prime is 6613619. The next prime is 6613753. The reversal of 6613631 is 1363166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6613631 - 2⁶ = 6613567 is a prime.

It is a super-2 number, since 2×6613631² = 87480230008322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6613631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6613601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3306815 + 3306816.

It is an arithmetic number, because the mean of its divisors is an integer number (3306816).

Almost surely, 2^6613631 is an apocalyptic number.

6613631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6613631 is an equidigital number, since it uses as much as digits as its factorization.

6613631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 6613631 is about 2571.6980771467. The cubic root of 6613631 is about 187.7067916997.

Adding to 6613631 its reverse (1363166), we get a palindrome (7976797).

The spelling of 6613631 in words is "six million, six hundred thirteen thousand, six hundred thirty-one".