6613664245 has 4 divisors (see below), whose sum is σ = 7936397100. Its totient is φ = 5290931392.

The previous prime is 6613664243. The next prime is 6613664257. The reversal of 6613664245 is 5424663166.

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 1036711204 + 5576953041 = 32198^2 + 74679^2 .

It is a cyclic number.

It is not a de Polignac number, because 6613664245 - 2¹ = 6613664243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6613664243) 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, 661366420 + ... + 661366429.

It is an arithmetic number, because the mean of its divisors is an integer number (1984099275).

Almost surely, 2^6613664245 is an apocalyptic number.

It is an amenable number.

6613664245 is a deficient number, since it is larger than the sum of its proper divisors (1322732855).

6613664245 is a wasteful number, since it uses less digits than its factorization.

6613664245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322732854.

The product of its digits is 622080, while the sum is 43.

The square root of 6613664245 is about 81324.4381782008. The cubic root of 6613664245 is about 1877.0710621689.

The spelling of 6613664245 in words is "six billion, six hundred thirteen million, six hundred sixty-four thousand, two hundred forty-five".