664464461776075 has 24 divisors (see below), whose sum is σ = 832434263922240. Its totient is φ = 526088829619200.

The previous prime is 664464461776013. The next prime is 664464461776109. The reversal of 664464461776075 is 570677164464466.

It is not a de Polignac number, because 664464461776075 - 2⁹ = 664464461775563 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664464461775989 and 664464461776007.

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, 592568190 + ... + 593688460.

It is an arithmetic number, because the mean of its divisors is an integer number (34684760996760).

Almost surely, 2^{664464461776075} is an apocalyptic number.

664464461776075 is a deficient number, since it is larger than the sum of its proper divisors (167969802146165).

664464461776075 is a wasteful number, since it uses less digits than its factorization.

664464461776075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364967 (or 1364962 counting only the distinct ones).

The product of its (nonzero) digits is 3413975040, while the sum is 73.

The spelling of 664464461776075 in words is "six hundred sixty-four trillion, four hundred sixty-four billion, four hundred sixty-one million, seven hundred seventy-six thousand, seventy-five".