6645365983 has 8 divisors (see below), whose sum is σ = 6656038928. Its totient is φ = 6634704384.

The previous prime is 6645365963. The next prime is 6645365999. The reversal of 6645365983 is 3895635466.

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 6645365983 - 2¹³ = 6645357791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645365963) 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 7 ways as a sum of consecutive naturals, for example, 3143935 + ... + 3146047.

It is an arithmetic number, because the mean of its divisors is an integer number (832004866).

Almost surely, 2^6645365983 is an apocalyptic number.

6645365983 is a deficient number, since it is larger than the sum of its proper divisors (10672945).

6645365983 is a wasteful number, since it uses less digits than its factorization.

6645365983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5673.

The product of its digits is 13996800, while the sum is 55.

The square root of 6645365983 is about 81519.1142186911. The cubic root of 6645365983 is about 1880.0654480573.

The spelling of 6645365983 in words is "six billion, six hundred forty-five million, three hundred sixty-five thousand, nine hundred eighty-three".