6881720733 has 12 divisors (see below), whose sum is σ = 9943488828. Its totient is φ = 4586325120.

The previous prime is 6881720719. The next prime is 6881720737. The reversal of 6881720733 is 3370271886.

It can be written as a sum of positive squares in 2 ways, for example, as 3097256409 + 3784464324 = 55653^2 + 61518^2 .

It is not a de Polignac number, because 6881720733 - 2⁵ = 6881720701 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6881720737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94410 + ... + 150587.

It is an arithmetic number, because the mean of its divisors is an integer number (828624069).

Almost surely, 2^6881720733 is an apocalyptic number.

It is an amenable number.

6881720733 is a deficient number, since it is larger than the sum of its proper divisors (3061768095).

6881720733 is a wasteful number, since it uses less digits than its factorization.

6881720733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248124 (or 248121 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 6881720733 is about 82956.1374040523. The cubic root of 6881720733 is about 1902.0956316958.

The spelling of 6881720733 in words is "six billion, eight hundred eighty-one million, seven hundred twenty thousand, seven hundred thirty-three".