851077663 has 4 divisors (see below), whose sum is σ = 874079800. Its totient is φ = 828075528.

The previous prime is 851077651. The next prime is 851077691. The reversal of 851077663 is 366770158.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851077663 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 (851077163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11501013 + ... + 11501086.

It is an arithmetic number, because the mean of its divisors is an integer number (218519950).

Almost surely, 2^851077663 is an apocalyptic number.

851077663 is a deficient number, since it is larger than the sum of its proper divisors (23002137).

851077663 is a wasteful number, since it uses less digits than its factorization.

851077663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23002136.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 851077663 is about 29173.2353879373. The cubic root of 851077663 is about 947.6683959371.

The spelling of 851077663 in words is "eight hundred fifty-one million, seventy-seven thousand, six hundred sixty-three".