10998661 has 2 divisors, whose sum is σ = 10998662. Its totient is φ = 10998660.

The previous prime is 10998607. The next prime is 10998671. The reversal of 10998661 is 16689901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10850436 + 148225 = 3294^2 + 385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10998661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10998601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5499330 + 5499331.

It is an arithmetic number, because the mean of its divisors is an integer number (5499331).

Almost surely, 2^10998661 is an apocalyptic number.

It is an amenable number.

10998661 is a deficient number, since it is larger than the sum of its proper divisors (1).

10998661 is an equidigital number, since it uses as much as digits as its factorization.

10998661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 10998661 is about 3316.4229223668. The cubic root of 10998661 is about 222.3889847231.

The spelling of 10998661 in words is "ten million, nine hundred ninety-eight thousand, six hundred sixty-one".