664845525534 has 32 divisors (see below), whose sum is σ = 1346637150720. Its totient is φ = 218791302912.

The previous prime is 664845525499. The next prime is 664845525571. The reversal of 664845525534 is 435525548466.

664845525534 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6211797 + ... + 6317919.

It is an arithmetic number, because the mean of its divisors is an integer number (42082410960).

Almost surely, 2^664845525534 is an apocalyptic number.

664845525534 is an abundant number, since it is smaller than the sum of its proper divisors (681791625186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664845525534 is a wasteful number, since it uses less digits than its factorization.

664845525534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119424.

The product of its digits is 69120000, while the sum is 57.

The spelling of 664845525534 in words is "six hundred sixty-four billion, eight hundred forty-five million, five hundred twenty-five thousand, five hundred thirty-four".