664732237466 has 32 divisors (see below), whose sum is σ = 1090119472128. Its totient is φ = 301491393840.

The previous prime is 664732237391. The next prime is 664732237471.

664732237466 is nontrivially palindromic in base 10.

664732237466 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×664732237466² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67915025 + ... + 67924811.

It is an arithmetic number, because the mean of its divisors is an integer number (34066233504).

Almost surely, 2^664732237466 is an apocalyptic number.

664732237466 is a deficient number, since it is larger than the sum of its proper divisors (425387234662).

664732237466 is a wasteful number, since it uses less digits than its factorization.

664732237466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16226.

The product of its digits is 36578304, while the sum is 56.

The spelling of 664732237466 in words is "six hundred sixty-four billion, seven hundred thirty-two million, two hundred thirty-seven thousand, four hundred sixty-six".