18628664067 has 56 divisors (see below), whose sum is σ = 30491866944. Its totient is φ = 11306335104.

The previous prime is 18628664017. The next prime is 18628664069. The reversal of 18628664067 is 76046682681.

18628664067 is a `hidden beast` number, since 1 + 8 + 628 + 6 + 6 + 4 + 0 + 6 + 7 = 666.

It is not a de Polignac number, because 18628664067 - 2⁶ = 18628664003 is a prime.

It is a super-2 number, since 2×18628664067² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18628664069) 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 55 ways as a sum of consecutive naturals, for example, 678358 + ... + 705284.

It is an arithmetic number, because the mean of its divisors is an integer number (544497624).

Almost surely, 2^18628664067 is an apocalyptic number.

18628664067 is a deficient number, since it is larger than the sum of its proper divisors (11863202877).

18628664067 is an equidigital number, since it uses as much as digits as its factorization.

18628664067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27031 (or 27016 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 18628664067 in words is "eighteen billion, six hundred twenty-eight million, six hundred sixty-four thousand, sixty-seven".