994966561 has 8 divisors (see below), whose sum is σ = 1000010024. Its totient is φ = 989936640.

The previous prime is 994966541. The next prime is 994966573. The reversal of 994966561 is 165669499.

It can be written as a sum of positive squares in 4 ways, for example, as 49773025 + 945193536 = 7055^2 + 30744^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 994966561 - 2⁷ = 994966433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (994966541) 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 7 ways as a sum of consecutive naturals, for example, 164161 + ... + 170113.

It is an arithmetic number, because the mean of its divisors is an integer number (125001253).

Almost surely, 2^994966561 is an apocalyptic number.

It is an amenable number.

994966561 is a deficient number, since it is larger than the sum of its proper divisors (5043463).

994966561 is a wasteful number, since it uses less digits than its factorization.

994966561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6771.

The product of its digits is 3149280, while the sum is 55.

The square root of 994966561 is about 31543.0905429382. The cubic root of 994966561 is about 998.3193640451.

The spelling of 994966561 in words is "nine hundred ninety-four million, nine hundred sixty-six thousand, five hundred sixty-one".