996498661 has 2 divisors, whose sum is σ = 996498662. Its totient is φ = 996498660.

The previous prime is 996498649. The next prime is 996498733. The reversal of 996498661 is 166894699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613552900 + 382945761 = 24770^2 + 19569^2 .

It is an emirp because it is prime and its reverse (166894699) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 996498661 - 2⁷ = 996498533 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 996498596 and 996498605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996498631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498249330 + 498249331.

It is an arithmetic number, because the mean of its divisors is an integer number (498249331).

Almost surely, 2^996498661 is an apocalyptic number.

It is an amenable number.

996498661 is a deficient number, since it is larger than the sum of its proper divisors (1).

996498661 is an equidigital number, since it uses as much as digits as its factorization.

996498661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 58.

The square root of 996498661 is about 31567.3670267256. The cubic root of 996498661 is about 998.8315221914.

The spelling of 996498661 in words is "nine hundred ninety-six million, four hundred ninety-eight thousand, six hundred sixty-one".