66062363544561 has 4 divisors (see below), whose sum is σ = 88083151392752. Its totient is φ = 44041575696372.

The previous prime is 66062363544521. The next prime is 66062363544577. The reversal of 66062363544561 is 16544536326066.

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 not a de Polignac number, because 66062363544561 - 2²¹ = 66062361447409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66062363544521) 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, 11010393924091 + ... + 11010393924096.

It is an arithmetic number, because the mean of its divisors is an integer number (22020787848188).

Almost surely, 2^{66062363544561} is an apocalyptic number.

It is an amenable number.

66062363544561 is a deficient number, since it is larger than the sum of its proper divisors (22020787848191).

66062363544561 is a wasteful number, since it uses less digits than its factorization.

66062363544561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22020787848190.

The product of its (nonzero) digits is 55987200, while the sum is 57.

The spelling of 66062363544561 in words is "sixty-six trillion, sixty-two billion, three hundred sixty-three million, five hundred forty-four thousand, five hundred sixty-one".