6612515545 has 4 divisors (see below), whose sum is σ = 7935018660. Its totient is φ = 5290012432.

The previous prime is 6612515521. The next prime is 6612515549. The reversal of 6612515545 is 5455152166.

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 1696121856 + 4916393689 = 41184^2 + 70117^2 .

It is a cyclic number.

It is not a de Polignac number, because 6612515545 - 2¹⁷ = 6612384473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6612515498 and 6612515507.

It is not an unprimeable number, because it can be changed into a prime (6612515549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661251550 + ... + 661251559.

It is an arithmetic number, because the mean of its divisors is an integer number (1983754665).

Almost surely, 2^6612515545 is an apocalyptic number.

It is an amenable number.

6612515545 is a deficient number, since it is larger than the sum of its proper divisors (1322503115).

6612515545 is a wasteful number, since it uses less digits than its factorization.

6612515545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322503114.

The product of its digits is 180000, while the sum is 40.

The square root of 6612515545 is about 81317.3754187873. The cubic root of 6612515545 is about 1876.9623823058.

The spelling of 6612515545 in words is "six billion, six hundred twelve million, five hundred fifteen thousand, five hundred forty-five".