664487484784466 has 12 divisors (see below), whose sum is σ = 1159462856103678. Its totient is φ = 284780350621872.

The previous prime is 664487484784429. The next prime is 664487484784477.

664487484784466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 624588617716441 + 39898867068025 = 24991771^2 + 6316555^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3390242269211 + ... + 3390242269406.

Almost surely, 2^{664487484784466} is an apocalyptic number.

664487484784466 is a deficient number, since it is larger than the sum of its proper divisors (494975371319212).

664487484784466 is a wasteful number, since it uses less digits than its factorization.

664487484784466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780484538633 (or 6780484538626 counting only the distinct ones).

The product of its digits is 133177540608, while the sum is 86.

The spelling of 664487484784466 in words is "six hundred sixty-four trillion, four hundred eighty-seven billion, four hundred eighty-four million, seven hundred eighty-four thousand, four hundred sixty-six".