966765581 has 24 divisors (see below), whose sum is σ = 1046073600. Its totient is φ = 893112480.

The previous prime is 966765559. The next prime is 966765589. The reversal of 966765581 is 185567669.

It is a de Polignac number, because none of the positive numbers 2^k-966765581 is a prime.

It is a super-2 number, since 2×966765581² = 1869271377212535122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966765589) 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 23 ways as a sum of consecutive naturals, for example, 3108416 + ... + 3108726.

It is an arithmetic number, because the mean of its divisors is an integer number (43586400).

Almost surely, 2^966765581 is an apocalyptic number.

It is an amenable number.

966765581 is a deficient number, since it is larger than the sum of its proper divisors (79308019).

966765581 is a wasteful number, since it uses less digits than its factorization.

966765581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 518 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 53.

The square root of 966765581 is about 31092.8541790554. The cubic root of 966765581 is about 988.7968177494.

The spelling of 966765581 in words is "nine hundred sixty-six million, seven hundred sixty-five thousand, five hundred eighty-one".