8891663 has 12 divisors (see below), whose sum is σ = 10307832. Its totient is φ = 7605120.

The previous prime is 8891657. The next prime is 8891689. The reversal of 8891663 is 3661988.

It is a happy number.

8891663 is an esthetic number in base 15, because in such base its adjacent digits differ by 1.

It is not a de Polignac number, because 8891663 - 2¹⁰ = 8890639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8891663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8891633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1781 + ... + 4577.

It is an arithmetic number, because the mean of its divisors is an integer number (858986).

Almost surely, 2^8891663 is an apocalyptic number.

8891663 is a deficient number, since it is larger than the sum of its proper divisors (1416169).

8891663 is a wasteful number, since it uses less digits than its factorization.

8891663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842 (or 2825 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The square root of 8891663 is about 2981.8891662837. The cubic root of 8891663 is about 207.1703810094.

It can be divided in two parts, 889 and 1663, that added together give a palindrome (2552).

The spelling of 8891663 in words is "eight million, eight hundred ninety-one thousand, six hundred sixty-three".