6613640845 has 8 divisors (see below), whose sum is σ = 9070136064. Its totient is φ = 4535067984.

The previous prime is 6613640837. The next prime is 6613640851. The reversal of 6613640845 is 5480463166.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6613640845 - 2³ = 6613640837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94480549 + ... + 94480618.

It is an arithmetic number, because the mean of its divisors is an integer number (1133767008).

Almost surely, 2^6613640845 is an apocalyptic number.

It is an amenable number.

6613640845 is a deficient number, since it is larger than the sum of its proper divisors (2456495219).

6613640845 is a wasteful number, since it uses less digits than its factorization.

6613640845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188961179.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 6613640845 is about 81324.2943098801. The cubic root of 6613640845 is about 1877.0688483928.

It can be divided in two parts, 661364084 and 5, that added together give a square (661364089 = 25717²).

The spelling of 6613640845 in words is "six billion, six hundred thirteen million, six hundred forty thousand, eight hundred forty-five".