6649497 has 24 divisors (see below), whose sum is σ = 10101000. Its totient is φ = 4209408.

The previous prime is 6649483. The next prime is 6649547. The reversal of 6649497 is 7949466.

It can be written as a sum of positive squares in 4 ways, for example, as 1879641 + 4769856 = 1371^2 + 2184^2 .

It is not a de Polignac number, because 6649497 - 2⁴ = 6649481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6649417) 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 23 ways as a sum of consecutive naturals, for example, 18879 + ... + 19227.

It is an arithmetic number, because the mean of its divisors is an integer number (420875).

Almost surely, 2^6649497 is an apocalyptic number.

It is an amenable number.

6649497 is a deficient number, since it is larger than the sum of its proper divisors (3451503).

6649497 is a wasteful number, since it uses less digits than its factorization.

6649497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 454 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6649497 is about 2578.6618622844. The cubic root of 6649497 is about 188.0454941205.

The spelling of 6649497 in words is "six million, six hundred forty-nine thousand, four hundred ninety-seven".