945968661 has 48 divisors (see below), whose sum is σ = 1552037760. Its totient is φ = 549951360.

The previous prime is 945968651. The next prime is 945968669. The reversal of 945968661 is 166869549.

It is a happy number.

It is not a de Polignac number, because 945968661 - 2¹¹ = 945966613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 945968598 and 945968607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945968669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478471 + ... + 480443.

It is an arithmetic number, because the mean of its divisors is an integer number (32334120).

Almost surely, 2^945968661 is an apocalyptic number.

It is an amenable number.

945968661 is a deficient number, since it is larger than the sum of its proper divisors (606069099).

945968661 is a wasteful number, since it uses less digits than its factorization.

945968661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2183 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 945968661 is about 30756.6035348509. The cubic root of 945968661 is about 981.6550753158.

The spelling of 945968661 in words is "nine hundred forty-five million, nine hundred sixty-eight thousand, six hundred sixty-one".