855566712 has 320 divisors, whose sum is σ = 3219955200. Its totient is φ = 204975360.

The previous prime is 855566711. The next prime is 855566741. The reversal of 855566712 is 217665558.

855566712 is a `hidden beast` number, since 85 + 5 + 566 + 7 + 1 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855566711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 647989 + ... + 649307.

It is an arithmetic number, because the mean of its divisors is an integer number (10062360).

Almost surely, 2^855566712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855566712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609977600).

855566712 is an abundant number, since it is smaller than the sum of its proper divisors (2364388488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855566712 is a wasteful number, since it uses less digits than its factorization.

855566712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368 (or 1355 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The square root of 855566712 is about 29250.0719999114. The cubic root of 855566712 is about 949.3316488357.

The spelling of 855566712 in words is "eight hundred fifty-five million, five hundred sixty-six thousand, seven hundred twelve".