664567453672055 has 4 divisors (see below), whose sum is σ = 797480944406472. Its totient is φ = 531653962937640.

The previous prime is 664567453672039. The next prime is 664567453672081. The reversal of 664567453672055 is 550276354765466.

664567453672055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 664567453672055 - 2⁴ = 664567453672039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664567453672055.

It is a congruent number.

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, 66456745367201 + ... + 66456745367210.

It is an arithmetic number, because the mean of its divisors is an integer number (199370236101618).

Almost surely, 2^{664567453672055} is an apocalyptic number.

664567453672055 is a deficient number, since it is larger than the sum of its proper divisors (132913490734417).

664567453672055 is a wasteful number, since it uses less digits than its factorization.

664567453672055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132913490734416.

The product of its (nonzero) digits is 3810240000, while the sum is 71.

The spelling of 664567453672055 in words is "six hundred sixty-four trillion, five hundred sixty-seven billion, four hundred fifty-three million, six hundred seventy-two thousand, fifty-five".