66474542741 has 4 divisors (see below), whose sum is σ = 66684241932. Its totient is φ = 66264843552.

The previous prime is 66474542599. The next prime is 66474542749. The reversal of 66474542741 is 14724547466.

66474542741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2425562500 + 64048980241 = 49250^2 + 253079^2 .

It is a cyclic number.

It is not a de Polignac number, because 66474542741 - 2¹⁴ = 66474526357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66474542741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66474542749) 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, 104849120 + ... + 104849753.

It is an arithmetic number, because the mean of its divisors is an integer number (16671060483).

Almost surely, 2^66474542741 is an apocalyptic number.

It is an amenable number.

66474542741 is a deficient number, since it is larger than the sum of its proper divisors (209699191).

66474542741 is a wasteful number, since it uses less digits than its factorization.

66474542741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209699190.

The product of its digits is 4515840, while the sum is 50.

The spelling of 66474542741 in words is "sixty-six billion, four hundred seventy-four million, five hundred forty-two thousand, seven hundred forty-one".