966056221 has 6 divisors (see below), whose sum is σ = 1046084730. Its totient is φ = 891744048.

The previous prime is 966056177. The next prime is 966056233. The reversal of 966056221 is 122650669.

It can be written as a sum of positive squares in 3 ways, for example, as 19263321 + 946792900 = 4389^2 + 30770^2 .

It is not a de Polignac number, because 966056221 - 2²⁵ = 932501789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966056291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2857986 + ... + 2858323.

It is an arithmetic number, because the mean of its divisors is an integer number (174347455).

Almost surely, 2^966056221 is an apocalyptic number.

It is an amenable number.

966056221 is a deficient number, since it is larger than the sum of its proper divisors (80028509).

966056221 is a wasteful number, since it uses less digits than its factorization.

966056221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5716335 (or 5716322 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 966056221 is about 31081.4449631931. Note that the first 3 decimals coincide. The cubic root of 966056221 is about 988.5549168008.

The spelling of 966056221 in words is "nine hundred sixty-six million, fifty-six thousand, two hundred twenty-one".