6621574745 has 8 divisors (see below), whose sum is σ = 7954853184. Its totient is φ = 5291284144.

The previous prime is 6621574733. The next prime is 6621574753. The reversal of 6621574745 is 5474751266.

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 6621574745 - 2²⁰ = 6620526169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6621574745.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 742079 + ... + 750948.

It is an arithmetic number, because the mean of its divisors is an integer number (994356648).

Almost surely, 2^6621574745 is an apocalyptic number.

It is an amenable number.

6621574745 is a deficient number, since it is larger than the sum of its proper divisors (1333278439).

6621574745 is a wasteful number, since it uses less digits than its factorization.

6621574745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493919.

The product of its digits is 1411200, while the sum is 47.

The square root of 6621574745 is about 81373.0590859161. The cubic root of 6621574745 is about 1877.8191424045.

The spelling of 6621574745 in words is "six billion, six hundred twenty-one million, five hundred seventy-four thousand, seven hundred forty-five".