855791966 has 8 divisors (see below), whose sum is σ = 1284746400. Its totient is φ = 427543168.

The previous prime is 855791941. The next prime is 855791969. The reversal of 855791966 is 669197558.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855791969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173366 + ... + 178233.

It is an arithmetic number, because the mean of its divisors is an integer number (160593300).

Almost surely, 2^855791966 is an apocalyptic number.

855791966 is a deficient number, since it is larger than the sum of its proper divisors (428954434).

855791966 is a wasteful number, since it uses less digits than its factorization.

855791966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352818.

The product of its digits is 4082400, while the sum is 56.

The square root of 855791966 is about 29253.9222327537. The cubic root of 855791966 is about 949.4149550172.

The spelling of 855791966 in words is "eight hundred fifty-five million, seven hundred ninety-one thousand, nine hundred sixty-six".