66241644575 has 24 divisors (see below), whose sum is σ = 82367445408. Its totient is φ = 52846577280.

The previous prime is 66241644551. The next prime is 66241644577. The reversal of 66241644575 is 57544614266.

It is not a de Polignac number, because 66241644575 - 2²⁶ = 66174535711 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 (66241644577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15573149 + ... + 15577401.

It is an arithmetic number, because the mean of its divisors is an integer number (3431976892).

Almost surely, 2^66241644575 is an apocalyptic number.

66241644575 is a deficient number, since it is larger than the sum of its proper divisors (16125800833).

66241644575 is a wasteful number, since it uses less digits than its factorization.

66241644575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843 (or 5838 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 50.

The spelling of 66241644575 in words is "sixty-six billion, two hundred forty-one million, six hundred forty-four thousand, five hundred seventy-five".