6640602171640 has 64 divisors (see below), whose sum is σ = 15122060553600. Its totient is φ = 2624118337152.

The previous prime is 6640602171631. The next prime is 6640602171689. The reversal of 6640602171640 is 461712060466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121946259 + ... + 122000701.

It is an arithmetic number, because the mean of its divisors is an integer number (236282196150).

Almost surely, 2^{6640602171640} is an apocalyptic number.

It is an amenable number.

6640602171640 is an abundant number, since it is smaller than the sum of its proper divisors (8481458381960).

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

6640602171640 is a wasteful number, since it uses less digits than its factorization.

6640602171640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91276 (or 91272 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 6640602171640 in words is "six trillion, six hundred forty billion, six hundred two million, one hundred seventy-one thousand, six hundred forty".