6553647 has 12 divisors (see below), whose sum is σ = 9505080. Its totient is φ = 4351248.

The previous prime is 6553621. The next prime is 6553663. The reversal of 6553647 is 7463556.

6553647 is a `hidden beast` number, since 6 + 5 + 5 + 3 + 647 = 666.

It is not a de Polignac number, because 6553647 - 2¹² = 6549551 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6553147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1068 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (792090).

Almost surely, 2^6553647 is an apocalyptic number.

6553647 is a deficient number, since it is larger than the sum of its proper divisors (2951433).

6553647 is a wasteful number, since it uses less digits than its factorization.

6553647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2979 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 6553647 is about 2560.0091796710. The cubic root of 6553647 is about 187.1375826040.

Subtracting 6553647 from its reverse (7463556), we obtain a palindrome (909909).

The spelling of 6553647 in words is "six million, five hundred fifty-three thousand, six hundred forty-seven".