6647953 has 12 divisors (see below), whose sum is σ = 7276080. Its totient is φ = 6070896.

The previous prime is 6647951. The next prime is 6647959. The reversal of 6647953 is 3597466.

It is not a de Polignac number, because 6647953 - 2¹ = 6647951 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6647951) 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, 23350 + ... + 23632.

It is an arithmetic number, because the mean of its divisors is an integer number (606340).

Almost surely, 2^6647953 is an apocalyptic number.

It is an amenable number.

6647953 is a deficient number, since it is larger than the sum of its proper divisors (628127).

6647953 is a wasteful number, since it uses less digits than its factorization.

6647953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 435 counting only the distinct ones).

The product of its digits is 136080, while the sum is 40.

The square root of 6647953 is about 2578.3624648214. The cubic root of 6647953 is about 188.0309383971.

The spelling of 6647953 in words is "six million, six hundred forty-seven thousand, nine hundred fifty-three".