664565565466 has 16 divisors (see below), whose sum is σ = 1122550633728. Its totient is φ = 292330893600.

The previous prime is 664565565451. The next prime is 664565565467.

664565565466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664565565398 and 664565565407.

It is not an unprimeable number, because it can be changed into a prime (664565565467) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 487217475 + ... + 487218838.

It is an arithmetic number, because the mean of its divisors is an integer number (70159414608).

Almost surely, 2^664565565466 is an apocalyptic number.

664565565466 is a deficient number, since it is larger than the sum of its proper divisors (457985068262).

664565565466 is a wasteful number, since it uses less digits than its factorization.

664565565466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974436357.

The product of its digits is 466560000, while the sum is 64.

The spelling of 664565565466 in words is "six hundred sixty-four billion, five hundred sixty-five million, five hundred sixty-five thousand, four hundred sixty-six".