6649287 has 8 divisors (see below), whose sum is σ = 8878320. Its totient is φ = 4426560.

The previous prime is 6649273. The next prime is 6649289. The reversal of 6649287 is 7829466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6649287 - 2⁴ = 6649271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6649289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2139 + ... + 4227.

It is an arithmetic number, because the mean of its divisors is an integer number (1109790).

Almost surely, 2^6649287 is an apocalyptic number.

6649287 is a deficient number, since it is larger than the sum of its proper divisors (2229033).

6649287 is a wasteful number, since it uses less digits than its factorization.

6649287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153.

The product of its digits is 145152, while the sum is 42.

The square root of 6649287 is about 2578.6211431693. The cubic root of 6649287 is about 188.0435145237.

The spelling of 6649287 in words is "six million, six hundred forty-nine thousand, two hundred eighty-seven".