6640269999 has 16 divisors (see below), whose sum is σ = 9774946944. Its totient is φ = 3975917600.

The previous prime is 6640269997. The next prime is 6640270003. The reversal of 6640269999 is 9999620466.

It is a cyclic number.

It is not a de Polignac number, because 6640269999 - 2¹ = 6640269997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640269997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1209432 + ... + 1214909.

It is an arithmetic number, because the mean of its divisors is an integer number (610934184).

Almost surely, 2^6640269999 is an apocalyptic number.

6640269999 is a deficient number, since it is larger than the sum of its proper divisors (3134676945).

6640269999 is a wasteful number, since it uses less digits than its factorization.

6640269999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424438.

The product of its (nonzero) digits is 11337408, while the sum is 60.

The square root of 6640269999 is about 81487.8518492174. The cubic root of 6640269999 is about 1879.5847505050.

The spelling of 6640269999 in words is "six billion, six hundred forty million, two hundred sixty-nine thousand, nine hundred ninety-nine".