846783661 has 2 divisors, whose sum is σ = 846783662. Its totient is φ = 846783660.

The previous prime is 846783629. The next prime is 846783667. The reversal of 846783661 is 166387648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746983561 + 99800100 = 27331^2 + 9990^2 .

It is a cyclic number.

It is not a de Polignac number, because 846783661 - 2⁵ = 846783629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (846783667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423391830 + 423391831.

It is an arithmetic number, because the mean of its divisors is an integer number (423391831).

Almost surely, 2^846783661 is an apocalyptic number.

It is an amenable number.

846783661 is a deficient number, since it is larger than the sum of its proper divisors (1).

846783661 is an equidigital number, since it uses as much as digits as its factorization.

846783661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The square root of 846783661 is about 29099.5474363434. The cubic root of 846783661 is about 946.0719286565.

The spelling of 846783661 in words is "eight hundred forty-six million, seven hundred eighty-three thousand, six hundred sixty-one".