851504663 has 2 divisors, whose sum is σ = 851504664. Its totient is φ = 851504662.

The previous prime is 851504603. The next prime is 851504681. The reversal of 851504663 is 366405158.

851504663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851504663 is a prime.

It is a super-2 number, since 2×851504663² = 1450120382221487138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851504603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425752331 + 425752332.

It is an arithmetic number, because the mean of its divisors is an integer number (425752332).

Almost surely, 2^851504663 is an apocalyptic number.

851504663 is a deficient number, since it is larger than the sum of its proper divisors (1).

851504663 is an equidigital number, since it uses as much as digits as its factorization.

851504663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 851504663 is about 29180.5528220423. The cubic root of 851504663 is about 947.8268565052.

The spelling of 851504663 in words is "eight hundred fifty-one million, five hundred four thousand, six hundred sixty-three".