663487666995 has 16 divisors (see below), whose sum is σ = 1061649273600. Its totient is φ = 353837086944.

The previous prime is 663487666931. The next prime is 663487667009. The reversal of 663487666995 is 599666784366.

It is not a de Polignac number, because 663487666995 - 2⁶ = 663487666931 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1197895 + ... + 1661904.

It is an arithmetic number, because the mean of its divisors is an integer number (66353079600).

Almost surely, 2^663487666995 is an apocalyptic number.

663487666995 is a deficient number, since it is larger than the sum of its proper divisors (398161606605).

663487666995 is a wasteful number, since it uses less digits than its factorization.

663487666995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875274.

The product of its digits is 2116316160, while the sum is 75.

The spelling of 663487666995 in words is "six hundred sixty-three billion, four hundred eighty-seven million, six hundred sixty-six thousand, nine hundred ninety-five".