664429262924466 has 48 divisors (see below), whose sum is σ = 1550341983928920. Its totient is φ = 204438845237760.

The previous prime is 664429262924437. The next prime is 664429262924501.

664429262924466 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 2 + 92 + 6 + 2 + 92 + 446 + 6 = 666.

664429262924466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 536386572720441 + 128042690204025 = 23160021^2 + 11315595^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664429262924394 and 664429262924403.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46132776 + ... + 58797036.

Almost surely, 2^{664429262924466} is an apocalyptic number.

664429262924466 is an abundant number, since it is smaller than the sum of its proper divisors (885912721004454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664429262924466 is a wasteful number, since it uses less digits than its factorization.

664429262924466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12888491 (or 12888488 counting only the distinct ones).

The product of its digits is 2579890176, while the sum is 72.

The spelling of 664429262924466 in words is "six hundred sixty-four trillion, four hundred twenty-nine billion, two hundred sixty-two million, nine hundred twenty-four thousand, four hundred sixty-six".