966028561 has 3 divisors (see below), whose sum is σ = 966059643. Its totient is φ = 965997480.

The previous prime is 966028559. The next prime is 966028601. The reversal of 966028561 is 165820669.

The square root of 966028561 is 31081.

It is a perfect power (a square), and thus also a powerful 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 only one way, i.e., 287946961 + 678081600 = 16969^2 + 26040^2 .

It is not a de Polignac number, because 966028561 - 2¹ = 966028559 is a prime.

It is a super-2 number, since 2×966028561² = 1866422361335461442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (966028501) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15541 + ... + 46621.

It is an arithmetic number, because the mean of its divisors is an integer number (322019881).

Almost surely, 2^966028561 is an apocalyptic number.

966028561 is the 31081-st square number.

966028561 is the 15541-st centered octagonal number.

It is an amenable number.

966028561 is a deficient number, since it is larger than the sum of its proper divisors (31082).

966028561 is an frugal number, since it uses more digits than its factorization.

966028561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62162 (or 31081 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The cubic root of 966028561 is about 988.5454819841.

The spelling of 966028561 in words is "nine hundred sixty-six million, twenty-eight thousand, five hundred sixty-one".