6985666298881 has 32 divisors (see below), whose sum is σ = 7673745250080. Its totient is φ = 6329704550400.

The previous prime is 6985666298861. The next prime is 6985666298917. The reversal of 6985666298881 is 1888926665896.

6985666298881 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 2548230400 + 6983118068481 = 50480^2 + 2642559^2 .

It is a cyclic number.

It is not a de Polignac number, because 6985666298881 - 2³⁷ = 6848227345409 is a prime.

It is a super-2 number, since 2×6985666298881² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6985666298795 and 6985666298804.

It is not an unprimeable number, because it can be changed into a prime (6985666298861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 747845271 + ... + 747854611.

It is an arithmetic number, because the mean of its divisors is an integer number (239804539065).

Almost surely, 2^{6985666298881} is an apocalyptic number.

It is an amenable number.

6985666298881 is a deficient number, since it is larger than the sum of its proper divisors (688078951199).

6985666298881 is a wasteful number, since it uses less digits than its factorization.

6985666298881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605.

The product of its digits is 4299816960, while the sum is 82.

The spelling of 6985666298881 in words is "six trillion, nine hundred eighty-five billion, six hundred sixty-six million, two hundred ninety-eight thousand, eight hundred eighty-one".