6662213 has 4 divisors (see below), whose sum is σ = 6824748. Its totient is φ = 6499680.

The previous prime is 6662209. The next prime is 6662231. The reversal of 6662213 is 3122666.

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 195364 + 6466849 = 442^2 + 2543^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662213 - 2² = 6662209 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 (6662233) 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, 81206 + ... + 81287.

It is an arithmetic number, because the mean of its divisors is an integer number (1706187).

Almost surely, 2^6662213 is an apocalyptic number.

It is an amenable number.

6662213 is a deficient number, since it is larger than the sum of its proper divisors (162535).

6662213 is a wasteful number, since it uses less digits than its factorization.

6662213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162534.

The product of its digits is 2592, while the sum is 26.

The square root of 6662213 is about 2581.1263045423. The cubic root of 6662213 is about 188.1652858320.

Adding to 6662213 its reverse (3122666), we get a palindrome (9784879).

The spelling of 6662213 in words is "six million, six hundred sixty-two thousand, two hundred thirteen".