6640124412 has 12 divisors (see below), whose sum is σ = 15493623656. Its totient is φ = 2213374800.

The previous prime is 6640124411. The next prime is 6640124431. The reversal of 6640124412 is 2144210466.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 6640124412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640124411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276671839 + ... + 276671862.

Almost surely, 2^6640124412 is an apocalyptic number.

It is an amenable number.

6640124412 is an abundant number, since it is smaller than the sum of its proper divisors (8853499244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6640124412 is a wasteful number, since it uses less digits than its factorization.

6640124412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553343708 (or 553343706 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 6640124412 is about 81486.9585393884. The cubic root of 6640124412 is about 1879.5710138595.

Adding to 6640124412 its reverse (2144210466), we get a palindrome (8784334878).

The spelling of 6640124412 in words is "six billion, six hundred forty million, one hundred twenty-four thousand, four hundred twelve".