6640124655 has 64 divisors (see below), whose sum is σ = 11319552000. Its totient is φ = 3314442240.

The previous prime is 6640124653. The next prime is 6640124657. The reversal of 6640124655 is 5564210466.

It is an interprime number because it is at equal distance from previous prime (6640124653) and next prime (6640124657).

It is not a de Polignac number, because 6640124655 - 2¹ = 6640124653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640124651) 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 63 ways as a sum of consecutive naturals, for example, 11507727 + ... + 11508303.

It is an arithmetic number, because the mean of its divisors is an integer number (176868000).

Almost surely, 2^6640124655 is an apocalyptic number.

6640124655 is a deficient number, since it is larger than the sum of its proper divisors (4679427345).

6640124655 is a wasteful number, since it uses less digits than its factorization.

6640124655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 6640124655 is about 81486.9600304245. The cubic root of 6640124655 is about 1879.5710367875.

The spelling of 6640124655 in words is "six billion, six hundred forty million, one hundred twenty-four thousand, six hundred fifty-five".