6647920333696 has 32 divisors (see below), whose sum is σ = 13264501005000. Its totient is φ = 3318790669824.

The previous prime is 6647920333679. The next prime is 6647920333697. The reversal of 6647920333696 is 6963330297466.

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

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647920333697) 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, 40304071 + ... + 40468678.

Almost surely, 2^{6647920333696} is an apocalyptic number.

It is an amenable number.

6647920333696 is a deficient number, since it is larger than the sum of its proper divisors (6616580671304).

6647920333696 is an equidigital number, since it uses as much as digits as its factorization.

6647920333696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80773406 (or 80773394 counting only the distinct ones).

The product of its (nonzero) digits is 158723712, while the sum is 64.

The spelling of 6647920333696 in words is "six trillion, six hundred forty-seven billion, nine hundred twenty million, three hundred thirty-three thousand, six hundred ninety-six".