6655213 has 4 divisors (see below), whose sum is σ = 6716380. Its totient is φ = 6594048.

The previous prime is 6655199. The next prime is 6655237. The reversal of 6655213 is 3125566.

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 5396329 + 1258884 = 2323^2 + 1122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6655213 is a prime.

It is a super-3 number, since 3×6655213³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6655273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30420 + ... + 30637.

It is an arithmetic number, because the mean of its divisors is an integer number (1679095).

Almost surely, 2^6655213 is an apocalyptic number.

It is an amenable number.

6655213 is a deficient number, since it is larger than the sum of its proper divisors (61167).

6655213 is a wasteful number, since it uses less digits than its factorization.

6655213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61166.

The product of its digits is 5400, while the sum is 28.

The square root of 6655213 is about 2579.7699509840. The cubic root of 6655213 is about 188.0993608617.

The spelling of 6655213 in words is "six million, six hundred fifty-five thousand, two hundred thirteen".