6650001001 has 16 divisors (see below), whose sum is σ = 7908171264. Its totient is φ = 5473450944.

The previous prime is 6650000999. The next prime is 6650001011. The reversal of 6650001001 is 1001000566.

It is a cyclic number.

It is not a de Polignac number, because 6650001001 - 2¹ = 6650000999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6650001001.

It is not an unprimeable number, because it can be changed into a prime (6650001011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173250 + ... + 208123.

It is an arithmetic number, because the mean of its divisors is an integer number (494260704).

Almost surely, 2^6650001001 is an apocalyptic number.

It is an amenable number.

6650001001 is a deficient number, since it is larger than the sum of its proper divisors (1258170263).

6650001001 is a wasteful number, since it uses less digits than its factorization.

6650001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381480.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 6650001001 is about 81547.5382890250. The cubic root of 6650001001 is about 1880.5024499228.

Adding to 6650001001 its reverse (1001000566), we get a palindrome (7651001567).

The spelling of 6650001001 in words is "six billion, six hundred fifty million, one thousand, one".