6612553 has 4 divisors (see below), whose sum is σ = 6619540. Its totient is φ = 6605568.

The previous prime is 6612547. The next prime is 6612563. The reversal of 6612553 is 3552166.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3504384 + 3108169 = 1872^2 + 1763^2 .

It is a cyclic number.

It is not a de Polignac number, because 6612553 - 2⁹ = 6612041 is a prime.

It is a Duffinian number.

6612553 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6612563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1800 + ... + 4057.

It is an arithmetic number, because the mean of its divisors is an integer number (1654885).

Almost surely, 2^6612553 is an apocalyptic number.

It is an amenable number.

6612553 is a deficient number, since it is larger than the sum of its proper divisors (6987).

6612553 is a wasteful number, since it uses less digits than its factorization.

6612553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6986.

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

The square root of 6612553 is about 2571.4884794609. The cubic root of 6612553 is about 187.6965926166.

The spelling of 6612553 in words is "six million, six hundred twelve thousand, five hundred fifty-three".