66455241541 has 4 divisors (see below), whose sum is σ = 71567183212. Its totient is φ = 61343299872.

The previous prime is 66455241511. The next prime is 66455241553. The reversal of 66455241541 is 14514255466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31596484516 + 34858757025 = 177754^2 + 186705^2 .

It is a cyclic number.

It is not a de Polignac number, because 66455241541 - 2⁹ = 66455241029 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 (66455241511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2555970816 + ... + 2555970841.

It is an arithmetic number, because the mean of its divisors is an integer number (17891795803).

Almost surely, 2^66455241541 is an apocalyptic number.

It is an amenable number.

66455241541 is a deficient number, since it is larger than the sum of its proper divisors (5111941671).

66455241541 is a wasteful number, since it uses less digits than its factorization.

66455241541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5111941670.

The product of its digits is 576000, while the sum is 43.

The spelling of 66455241541 in words is "sixty-six billion, four hundred fifty-five million, two hundred forty-one thousand, five hundred forty-one".