6649517 has 4 divisors (see below), whose sum is σ = 7599456. Its totient is φ = 5699580.

The previous prime is 6649483. The next prime is 6649547. The reversal of 6649517 is 7159466.

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.

It is a cyclic number.

It is not a de Polignac number, because 6649517 - 2⁶ = 6649453 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 (6649547) 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, 474959 + ... + 474972.

It is an arithmetic number, because the mean of its divisors is an integer number (1899864).

Almost surely, 2^6649517 is an apocalyptic number.

It is an amenable number.

6649517 is a deficient number, since it is larger than the sum of its proper divisors (949939).

6649517 is an equidigital number, since it uses as much as digits as its factorization.

6649517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949938.

The product of its digits is 45360, while the sum is 38.

The square root of 6649517 is about 2578.6657402618. The cubic root of 6649517 is about 188.0456826514.

The spelling of 6649517 in words is "six million, six hundred forty-nine thousand, five hundred seventeen".