6651313 has 4 divisors (see below), whose sum is σ = 6667108. Its totient is φ = 6635520.

The previous prime is 6651277. The next prime is 6651317. The reversal of 6651313 is 3131566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2782224 + 3869089 = 1668^2 + 1967^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651313 - 2⁹ = 6650801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6651317) 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, 7248 + ... + 8113.

It is an arithmetic number, because the mean of its divisors is an integer number (1666777).

Almost surely, 2^6651313 is an apocalyptic number.

It is an amenable number.

6651313 is a deficient number, since it is larger than the sum of its proper divisors (15795).

6651313 is a wasteful number, since it uses less digits than its factorization.

6651313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15794.

The product of its digits is 1620, while the sum is 25.

The square root of 6651313 is about 2579.0139588610. The cubic root of 6651313 is about 188.0626111814.

Adding to 6651313 its reverse (3131566), we get a palindrome (9782879).

The spelling of 6651313 in words is "six million, six hundred fifty-one thousand, three hundred thirteen".