6653959 has 4 divisors (see below), whose sum is σ = 7165816. Its totient is φ = 6142104.

The previous prime is 6653957. The next prime is 6653989. The reversal of 6653959 is 9593566.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9593566 = 2 ⋅4796783.

It is a cyclic number.

It is not a de Polignac number, because 6653959 - 2¹ = 6653957 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 (6653957) 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, 255909 + ... + 255934.

It is an arithmetic number, because the mean of its divisors is an integer number (1791454).

Almost surely, 2^6653959 is an apocalyptic number.

6653959 is a deficient number, since it is larger than the sum of its proper divisors (511857).

6653959 is a wasteful number, since it uses less digits than its factorization.

6653959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511856.

The product of its digits is 218700, while the sum is 43.

The square root of 6653959 is about 2579.5268946068. The cubic root of 6653959 is about 188.0875459924.

It can be divided in two parts, 665 and 3959, that added together give a square (4624 = 68²).

The spelling of 6653959 in words is "six million, six hundred fifty-three thousand, nine hundred fifty-nine".