80811663 has 16 divisors (see below), whose sum is σ = 113241216. Its totient is φ = 51196320.

The previous prime is 80811631. The next prime is 80811667. The reversal of 80811663 is 36611808.

It is not a de Polignac number, because 80811663 - 2⁵ = 80811631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80811667) 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 15 ways as a sum of consecutive naturals, for example, 3693 + ... + 13238.

It is an arithmetic number, because the mean of its divisors is an integer number (7077576).

Almost surely, 2^80811663 is an apocalyptic number.

80811663 is a deficient number, since it is larger than the sum of its proper divisors (32429553).

80811663 is a wasteful number, since it uses less digits than its factorization.

80811663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17014.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 80811663 is about 8989.5307441490. The cubic root of 80811663 is about 432.3392664557.

The spelling of 80811663 in words is "eighty million, eight hundred eleven thousand, six hundred sixty-three".