856041663 has 8 divisors (see below), whose sum is σ = 1141706800. Its totient is φ = 570535488.

The previous prime is 856041653. The next prime is 856041673. The reversal of 856041663 is 366140658.

856041663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856041653) and next prime (856041673).

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

It is not a de Polignac number, because 856041663 - 2¹³ = 856033471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856041643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26548 + ... + 49161.

It is an arithmetic number, because the mean of its divisors is an integer number (142713350).

Almost surely, 2^856041663 is an apocalyptic number.

856041663 is a deficient number, since it is larger than the sum of its proper divisors (285665137).

856041663 is a wasteful number, since it uses less digits than its factorization.

856041663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79481.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 856041663 is about 29258.1896740041. The cubic root of 856041663 is about 949.5072839252.

The spelling of 856041663 in words is "eight hundred fifty-six million, forty-one thousand, six hundred sixty-three".