664136631466 has 128 divisors (see below), whose sum is σ = 1319907778560. Its totient is φ = 243049766400.

The previous prime is 664136631461. The next prime is 664136631481.

664136631466 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (664136631461) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67194961 + ... + 67204843.

It is an arithmetic number, because the mean of its divisors is an integer number (10311779520).

Almost surely, 2^664136631466 is an apocalyptic number.

664136631466 is a deficient number, since it is larger than the sum of its proper divisors (655771147094).

664136631466 is a wasteful number, since it uses less digits than its factorization.

664136631466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340.

The product of its digits is 6718464, while the sum is 52.

The spelling of 664136631466 in words is "six hundred sixty-four billion, one hundred thirty-six million, six hundred thirty-one thousand, four hundred sixty-six".