665164461566 has 8 divisors (see below), whose sum is σ = 1088450937144. Its totient is φ = 302347482520.

The previous prime is 665164461529. The next prime is 665164461571.

665164461566 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15117374105 + ... + 15117374148.

It is an arithmetic number, because the mean of its divisors is an integer number (136056367143).

Almost surely, 2^665164461566 is an apocalyptic number.

665164461566 is a deficient number, since it is larger than the sum of its proper divisors (423286475578).

665164461566 is a wasteful number, since it uses less digits than its factorization.

665164461566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30234748266.

The product of its digits is 18662400, while the sum is 56.

The spelling of 665164461566 in words is "six hundred sixty-five billion, one hundred sixty-four million, four hundred sixty-one thousand, five hundred sixty-six".