664555606555466 has 8 divisors (see below), whose sum is σ = 996836532832260. Its totient is φ = 332276762278048.

The previous prime is 664555606555459. The next prime is 664555606555559.

664555606555466 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 664141090774225 + 414515781241 = 25770935^2 + 643829^2 .

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 = 664555606555393 and 664555606555402.

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, 519701621 + ... + 520978776.

Almost surely, 2^{664555606555466} is an apocalyptic number.

664555606555466 is a deficient number, since it is larger than the sum of its proper divisors (332280926276794).

664555606555466 is a wasteful number, since it uses less digits than its factorization.

664555606555466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040999688.

The product of its (nonzero) digits is 11664000000, while the sum is 74.

The spelling of 664555606555466 in words is "six hundred sixty-four trillion, five hundred fifty-five billion, six hundred six million, five hundred fifty-five thousand, four hundred sixty-six".