806649505 has 8 divisors (see below), whose sum is σ = 969047424. Its totient is φ = 644607600.

The previous prime is 806649499. The next prime is 806649509. The reversal of 806649505 is 505946608.

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

It is not a de Polignac number, because 806649505 - 2³ = 806649497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806649509) 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 7 ways as a sum of consecutive naturals, for example, 83991 + ... + 93100.

It is an arithmetic number, because the mean of its divisors is an integer number (121130928).

Almost surely, 2^806649505 is an apocalyptic number.

It is an amenable number.

806649505 is a deficient number, since it is larger than the sum of its proper divisors (162397919).

806649505 is a wasteful number, since it uses less digits than its factorization.

806649505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178007.

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 806649505 is about 28401.5757485390. The cubic root of 806649505 is about 930.8826956793.

The spelling of 806649505 in words is "eight hundred six million, six hundred forty-nine thousand, five hundred five".