664271455903 has 6 divisors (see below), whose sum is σ = 730149616952. Its totient is φ = 603883141620.

The previous prime is 664271455877. The next prime is 664271455909. The reversal of 664271455903 is 309554172466.

664271455903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664271455903 - 2¹³ = 664271447711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664271455909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2744923251 + ... + 2744923492.

Almost surely, 2^664271455903 is an apocalyptic number.

664271455903 is a deficient number, since it is larger than the sum of its proper divisors (65878161049).

664271455903 is a wasteful number, since it uses less digits than its factorization.

664271455903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489846765 (or 5489846754 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 664271455903 in words is "six hundred sixty-four billion, two hundred seventy-one million, four hundred fifty-five thousand, nine hundred three".