855066657899 has 16 divisors (see below), whose sum is σ = 925575275520. Its totient is φ = 787840722240.

The previous prime is 855066657877. The next prime is 855066657923. The reversal of 855066657899 is 998756660558.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855066657899 is a prime.

It is a super-2 number, since 2×855066657899² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855066657829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5664437 + ... + 5813430.

It is an arithmetic number, because the mean of its divisors is an integer number (57848454720).

Almost surely, 2^855066657899 is an apocalyptic number.

855066657899 is a deficient number, since it is larger than the sum of its proper divisors (70508617621).

855066657899 is a wasteful number, since it uses less digits than its factorization.

855066657899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11478010.

The product of its (nonzero) digits is 979776000, while the sum is 74.

The spelling of 855066657899 in words is "eight hundred fifty-five billion, sixty-six million, six hundred fifty-seven thousand, eight hundred ninety-nine".