6668653 has 4 divisors (see below), whose sum is σ = 6737500. Its totient is φ = 6599808.

The previous prime is 6668617. The next prime is 6668659. The reversal of 6668653 is 3568666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3568666 = 2 ⋅1784333.

It can be written as a sum of positive squares in 2 ways, for example, as 1592644 + 5076009 = 1262^2 + 2253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668653 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 (6668659) 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, 34278 + ... + 34471.

It is an arithmetic number, because the mean of its divisors is an integer number (1684375).

Almost surely, 2^6668653 is an apocalyptic number.

It is an amenable number.

6668653 is a deficient number, since it is larger than the sum of its proper divisors (68847).

6668653 is an equidigital number, since it uses as much as digits as its factorization.

6668653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68846.

The product of its digits is 155520, while the sum is 40.

The square root of 6668653 is about 2582.3735206201. The cubic root of 6668653 is about 188.2258960324.

The spelling of 6668653 in words is "six million, six hundred sixty-eight thousand, six hundred fifty-three".