6640004133 has 16 divisors (see below), whose sum is σ = 11242335360. Its totient is φ = 3794287968.

The previous prime is 6640004131. The next prime is 6640004183. The reversal of 6640004133 is 3314000466.

6640004133 is a `hidden beast` number, since 6 + 640 + 0 + 0 + 4 + 13 + 3 = 666.

It is not a de Polignac number, because 6640004133 - 2¹ = 6640004131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6640004097 and 6640004106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640004131) 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, 17565960 + ... + 17566337.

It is an arithmetic number, because the mean of its divisors is an integer number (702645960).

Almost surely, 2^6640004133 is an apocalyptic number.

6640004133 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

6640004133 is a deficient number, since it is larger than the sum of its proper divisors (4602331227).

6640004133 is a wasteful number, since it uses less digits than its factorization.

6640004133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35132313 (or 35132307 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6640004133 is about 81486.2205099733. The cubic root of 6640004133 is about 1879.5596649613.

Adding to 6640004133 its reverse (3314000466), we get a palindrome (9954004599).

The spelling of 6640004133 in words is "six billion, six hundred forty million, four thousand, one hundred thirty-three".