6669700000640 has 32 divisors (see below), whose sum is σ = 15944751565560. Its totient is φ = 2667880000000.

The previous prime is 6669700000571. The next prime is 6669700000721. The reversal of 6669700000640 is 460000079666.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 6669700000591 and 6669700000600.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5210702486 + ... + 5210703765.

Almost surely, 2^{6669700000640} is an apocalyptic number.

It is an amenable number.

6669700000640 is an abundant number, since it is smaller than the sum of its proper divisors (9275051564920).

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

6669700000640 is a wasteful number, since it uses less digits than its factorization.

6669700000640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421406270 (or 10421406258 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 6669700000640 in words is "six trillion, six hundred sixty-nine billion, seven hundred million, six hundred forty", and thus it is an aban number.