802661 has 2 divisors, whose sum is σ = 802662. Its totient is φ = 802660.

The previous prime is 802651. The next prime is 802667. The reversal of 802661 is 166208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 630436 + 172225 = 794^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 802661 - 2⁶ = 802597 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 802661.

It is not a weakly prime, because it can be changed into another prime (802667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401330 + 401331.

It is an arithmetic number, because the mean of its divisors is an integer number (401331).

2⁸⁰²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

802661 is a deficient number, since it is larger than the sum of its proper divisors (1).

802661 is an equidigital number, since it uses as much as digits as its factorization.

802661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 802661 is about 895.9135002890. The cubic root of 802661 is about 92.9345899945.

Adding to 802661 its reverse (166208), we get a palindrome (968869).

The spelling of 802661 in words is "eight hundred two thousand, six hundred sixty-one".