996000661 has 2 divisors, whose sum is σ = 996000662. Its totient is φ = 996000660.

The previous prime is 996000613. The next prime is 996000683. The reversal of 996000661 is 166000699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949009636 + 46991025 = 30806^2 + 6855^2 .

It is a cyclic number.

It is not a de Polignac number, because 996000661 - 2⁹ = 996000149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 996000661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996000601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498000330 + 498000331.

It is an arithmetic number, because the mean of its divisors is an integer number (498000331).

Almost surely, 2^996000661 is an apocalyptic number.

It is an amenable number.

996000661 is a deficient number, since it is larger than the sum of its proper divisors (1).

996000661 is an equidigital number, since it uses as much as digits as its factorization.

996000661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 996000661 is about 31559.4781484105. The cubic root of 996000661 is about 998.6651058505.

The spelling of 996000661 in words is "nine hundred ninety-six million, six hundred sixty-one", and thus it is an aban number.