64534666887 has 6 divisors (see below), whose sum is σ = 93216741072. Its totient is φ = 43023111252.

The previous prime is 64534666871. The next prime is 64534666927. The reversal of 64534666887 is 78866643546.

64534666887 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 64534666887 - 2⁴ = 64534666871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64534666187) 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, 3585259263 + ... + 3585259280.

It is an arithmetic number, because the mean of its divisors is an integer number (15536123512).

Almost surely, 2^64534666887 is an apocalyptic number.

64534666887 is a deficient number, since it is larger than the sum of its proper divisors (28682074185).

64534666887 is a wasteful number, since it uses less digits than its factorization.

64534666887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170518549 (or 7170518546 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 63.

The spelling of 64534666887 in words is "sixty-four billion, five hundred thirty-four million, six hundred sixty-six thousand, eight hundred eighty-seven".