66325435615644 has 12 divisors (see below), whose sum is σ = 154759349769864. Its totient is φ = 22108478538544.

The previous prime is 66325435615603. The next prime is 66325435615661. The reversal of 66325435615644 is 44651653452366.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2763559817307 + ... + 2763559817330.

It is an arithmetic number, because the mean of its divisors is an integer number (12896612480822).

Almost surely, 2^{66325435615644} is an apocalyptic number.

It is an amenable number.

66325435615644 is an abundant number, since it is smaller than the sum of its proper divisors (88433914154220).

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

66325435615644 is a wasteful number, since it uses less digits than its factorization.

66325435615644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527119634644 (or 5527119634642 counting only the distinct ones).

The product of its digits is 186624000, while the sum is 60.

The spelling of 66325435615644 in words is "sixty-six trillion, three hundred twenty-five billion, four hundred thirty-five million, six hundred fifteen thousand, six hundred forty-four".