806665316547 has 32 divisors (see below), whose sum is σ = 1083749990400. Its totient is φ = 533698688160.

The previous prime is 806665316521. The next prime is 806665316549. The reversal of 806665316547 is 745613566608.

It is not a de Polignac number, because 806665316547 - 2⁷ = 806665316419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (806665316549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 336249454 + ... + 336251852.

It is an arithmetic number, because the mean of its divisors is an integer number (33867187200).

Almost surely, 2^806665316547 is an apocalyptic number.

806665316547 is a deficient number, since it is larger than the sum of its proper divisors (277084673853).

806665316547 is a wasteful number, since it uses less digits than its factorization.

806665316547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4143.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 806665316547 in words is "eight hundred six billion, six hundred sixty-five million, three hundred sixteen thousand, five hundred forty-seven".