6681035961 has 6 divisors (see below), whose sum is σ = 9650385290. Its totient is φ = 4454023968.

The previous prime is 6681035951. The next prime is 6681035969. The reversal of 6681035961 is 1695301866.

It can be written as a sum of positive squares in only one way, i.e., 6013071936 + 667964025 = 77544^2 + 25845^2 .

It is not a de Polignac number, because 6681035961 - 2⁷ = 6681035833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6681035969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371168656 + ... + 371168673.

Almost surely, 2^6681035961 is an apocalyptic number.

It is an amenable number.

6681035961 is a deficient number, since it is larger than the sum of its proper divisors (2969349329).

6681035961 is a wasteful number, since it uses less digits than its factorization.

6681035961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742337335 (or 742337332 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 6681035961 is about 81737.6043262830. The cubic root of 6681035961 is about 1883.4232897817.

The spelling of 6681035961 in words is "six billion, six hundred eighty-one million, thirty-five thousand, nine hundred sixty-one".