664487784466 has 32 divisors (see below), whose sum is σ = 1093114020096. Its totient is φ = 300438642000.

The previous prime is 664487784437. The next prime is 664487784503.

664487784466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664487784395 and 664487784404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8367141 + ... + 8446183.

It is an arithmetic number, because the mean of its divisors is an integer number (34159813128).

Almost surely, 2^664487784466 is an apocalyptic number.

664487784466 is a deficient number, since it is larger than the sum of its proper divisors (428626235630).

664487784466 is a wasteful number, since it uses less digits than its factorization.

664487784466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81078.

The product of its digits is 1040449536, while the sum is 70.

The spelling of 664487784466 in words is "six hundred sixty-four billion, four hundred eighty-seven million, seven hundred eighty-four thousand, four hundred sixty-six".