6997523910961 has 4 divisors (see below), whose sum is σ = 7129552664052. Its totient is φ = 6865495157872.

The previous prime is 6997523910959. The next prime is 6997523910967. The reversal of 6997523910961 is 1690193257996.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2046275891361 + 4951248019600 = 1430481^2 + 2225140^2 .

It is a cyclic number.

It is not a de Polignac number, because 6997523910961 - 2¹ = 6997523910959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6997523910967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66014376466 + ... + 66014376571.

It is an arithmetic number, because the mean of its divisors is an integer number (1782388166013).

Almost surely, 2^{6997523910961} is an apocalyptic number.

It is an amenable number.

6997523910961 is a deficient number, since it is larger than the sum of its proper divisors (132028753091).

6997523910961 is a wasteful number, since it uses less digits than its factorization.

6997523910961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132028753090.

The product of its (nonzero) digits is 49601160, while the sum is 67.

The spelling of 6997523910961 in words is "six trillion, nine hundred ninety-seven billion, five hundred twenty-three million, nine hundred ten thousand, nine hundred sixty-one".