965661811 has 12 divisors (see below), whose sum is σ = 1003231872. Its totient is φ = 929442000.

The previous prime is 965661787. The next prime is 965661817. The reversal of 965661811 is 118166569.

It is not a de Polignac number, because 965661811 - 2¹⁵ = 965629043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (965661817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180921 + ... + 186181.

It is an arithmetic number, because the mean of its divisors is an integer number (83602656).

Almost surely, 2^965661811 is an apocalyptic number.

965661811 is a deficient number, since it is larger than the sum of its proper divisors (37570061).

965661811 is a wasteful number, since it uses less digits than its factorization.

965661811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514 (or 5483 counting only the distinct ones).

The product of its digits is 77760, while the sum is 43.

The square root of 965661811 is about 31075.0995332276. The cubic root of 965661811 is about 988.4203666545.

The spelling of 965661811 in words is "nine hundred sixty-five million, six hundred sixty-one thousand, eight hundred eleven".