664744447466 has 8 divisors (see below), whose sum is σ = 1087763641344. Its totient is φ = 302156567020.

The previous prime is 664744447457. The next prime is 664744447489.

It is a happy number.

664744447466 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 664744447399 and 664744447408.

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 3 ways as a sum of consecutive naturals, for example, 15107828330 + ... + 15107828373.

It is an arithmetic number, because the mean of its divisors is an integer number (135970455168).

Almost surely, 2^664744447466 is an apocalyptic number.

664744447466 is a deficient number, since it is larger than the sum of its proper divisors (423019193878).

664744447466 is a wasteful number, since it uses less digits than its factorization.

664744447466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30215656716.

The product of its digits is 260112384, while the sum is 62.

The spelling of 664744447466 in words is "six hundred sixty-four billion, seven hundred forty-four million, four hundred forty-seven thousand, four hundred sixty-six".