806670641 has 8 divisors (see below), whose sum is σ = 953699520. Its totient is φ = 667589328.

The previous prime is 806670637. The next prime is 806670643. The reversal of 806670641 is 146076608.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 806670641 - 2² = 806670637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 806670595 and 806670604.

It is not an unprimeable number, because it can be changed into a prime (806670643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1986671 + ... + 1987076.

It is an arithmetic number, because the mean of its divisors is an integer number (119212440).

Almost surely, 2^806670641 is an apocalyptic number.

It is an amenable number.

806670641 is a deficient number, since it is larger than the sum of its proper divisors (147028879).

806670641 is a wasteful number, since it uses less digits than its factorization.

806670641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973783.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 806670641 is about 28401.9478381325. The cubic root of 806670641 is about 930.8908260030.

The spelling of 806670641 in words is "eight hundred six million, six hundred seventy thousand, six hundred forty-one".