6655640432 has 20 divisors (see below), whose sum is σ = 14737489776. Its totient is φ = 2852417280.

The previous prime is 6655640423. The next prime is 6655640441. The reversal of 6655640432 is 2340465566.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6655640423) and next prime (6655640441).

It is a self number, because there is not a number n which added to its sum of digits gives 6655640432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29712569 + ... + 29712792.

Almost surely, 2^6655640432 is an apocalyptic number.

It is an amenable number.

6655640432 is an abundant number, since it is smaller than the sum of its proper divisors (8081849344).

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

6655640432 is a wasteful number, since it uses less digits than its factorization.

6655640432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59425376 (or 59425370 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 6655640432 is about 81582.1085287700. The cubic root of 6655640432 is about 1881.0338767817.

The spelling of 6655640432 in words is "six billion, six hundred fifty-five million, six hundred forty thousand, four hundred thirty-two".