806243661 has 24 divisors (see below), whose sum is σ = 1174358016. Its totient is φ = 533000160.

The previous prime is 806243651. The next prime is 806243671. The reversal of 806243661 is 166342608.

It is an interprime number because it is at equal distance from previous prime (806243651) and next prime (806243671).

It is not a de Polignac number, because 806243661 - 2¹⁹ = 805719373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806243611) 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 in 23 ways as a sum of consecutive naturals, for example, 795391 + ... + 796403.

It is an arithmetic number, because the mean of its divisors is an integer number (48931584).

Almost surely, 2^806243661 is an apocalyptic number.

It is an amenable number.

806243661 is a deficient number, since it is larger than the sum of its proper divisors (368114355).

806243661 is a wasteful number, since it uses less digits than its factorization.

806243661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1670 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 806243661 is about 28394.4301052161. The cubic root of 806243661 is about 930.7265532941.

The spelling of 806243661 in words is "eight hundred six million, two hundred forty-three thousand, six hundred sixty-one".