66528959488441 has 4 divisors (see below), whose sum is σ = 66638562387712. Its totient is φ = 66419356589172.

The previous prime is 66528959488427. The next prime is 66528959488513. The reversal of 66528959488441 is 14488495982566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66528959488441 - 2⁹ = 66528959487929 is a prime.

It is a super-2 number, since 2×66528959488441² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66528959488741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54801448725 + ... + 54801449938.

It is an arithmetic number, because the mean of its divisors is an integer number (16659640596928).

Almost surely, 2^{66528959488441} is an apocalyptic number.

It is an amenable number.

66528959488441 is a deficient number, since it is larger than the sum of its proper divisors (109602899271).

66528959488441 is a wasteful number, since it uses less digits than its factorization.

66528959488441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109602899270.

The product of its digits is 4777574400, while the sum is 79.

The spelling of 66528959488441 in words is "sixty-six trillion, five hundred twenty-eight billion, nine hundred fifty-nine million, four hundred eighty-eight thousand, four hundred forty-one".