207968444661 has 4 divisors (see below), whose sum is σ = 277291259552. Its totient is φ = 138645629772.

The previous prime is 207968444627. The next prime is 207968444683. The reversal of 207968444661 is 166444869702.

207968444661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 207968444661 - 2⁶ = 207968444597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207968444161) 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 3 ways as a sum of consecutive naturals, for example, 34661407441 + ... + 34661407446.

It is an arithmetic number, because the mean of its divisors is an integer number (69322814888).

Almost surely, 2^207968444661 is an apocalyptic number.

It is an amenable number.

207968444661 is a deficient number, since it is larger than the sum of its proper divisors (69322814891).

207968444661 is an equidigital number, since it uses as much as digits as its factorization.

207968444661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69322814890.

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 207968444661 in words is "two hundred seven billion, nine hundred sixty-eight million, four hundred forty-four thousand, six hundred sixty-one".