6649371 has 20 divisors (see below), whose sum is σ = 10042032. Its totient is φ = 4384368.

The previous prime is 6649367. The next prime is 6649387. The reversal of 6649371 is 1739466.

6649371 is a `hidden beast` number, since 6 + 649 + 3 + 7 + 1 = 666.

It is not a de Polignac number, because 6649371 - 2² = 6649367 is a prime.

6649371 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6649271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7945 + ... + 8741.

Almost surely, 2^6649371 is an apocalyptic number.

6649371 is a deficient number, since it is larger than the sum of its proper divisors (3392661).

6649371 is a wasteful number, since it uses less digits than its factorization.

6649371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 903 counting only the distinct ones).

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

The square root of 6649371 is about 2578.6374308925. The cubic root of 6649371 is about 188.0443063674.

It can be divided in two parts, 66493 and 71, that added together give a square (66564 = 258²).

The spelling of 6649371 in words is "six million, six hundred forty-nine thousand, three hundred seventy-one".