966636481 has 4 divisors (see below), whose sum is σ = 966698964. Its totient is φ = 966574000.

The previous prime is 966636449. The next prime is 966636487. The reversal of 966636481 is 184636669.

966636481 = 21984² + 21985².

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 483296256 + 483340225 = 21984^2 + 21985^2 .

It is a cyclic number.

It is not a de Polignac number, because 966636481 - 2⁵ = 966636449 is a prime.

It is a super-2 number, since 2×966636481² = 1868772172800126722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (966636487) 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, 11031 + ... + 45331.

It is an arithmetic number, because the mean of its divisors is an integer number (241674741).

Almost surely, 2^966636481 is an apocalyptic number.

966636481 is the 21985-th centered square number.

It is an amenable number.

966636481 is a deficient number, since it is larger than the sum of its proper divisors (62483).

966636481 is a wasteful number, since it uses less digits than its factorization.

966636481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62482.

The product of its digits is 1119744, while the sum is 49.

The square root of 966636481 is about 31090.7780700323. The cubic root of 966636481 is about 988.7528017872.

The spelling of 966636481 in words is "nine hundred sixty-six million, six hundred thirty-six thousand, four hundred eighty-one".