966316781 has 4 divisors (see below), whose sum is σ = 966407964. Its totient is φ = 966225600.

The previous prime is 966316777. The next prime is 966316783. The reversal of 966316781 is 187613669.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 198528100 + 767788681 = 14090^2 + 27709^2 .

It is a cyclic number.

It is not a de Polignac number, because 966316781 - 2² = 966316777 is a prime.

It is a super-2 number, since 2×966316781² = 1867536242484403922, 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 (966316783) 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 3 ways as a sum of consecutive naturals, for example, 27230 + ... + 51711.

It is an arithmetic number, because the mean of its divisors is an integer number (241601991).

Almost surely, 2^966316781 is an apocalyptic number.

It is an amenable number.

966316781 is a deficient number, since it is larger than the sum of its proper divisors (91183).

966316781 is a wasteful number, since it uses less digits than its factorization.

966316781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91182.

The product of its digits is 326592, while the sum is 47.

The square root of 966316781 is about 31085.6362489173. The cubic root of 966316781 is about 988.6437848913.

The spelling of 966316781 in words is "nine hundred sixty-six million, three hundred sixteen thousand, seven hundred eighty-one".