66327771145 has 16 divisors (see below), whose sum is σ = 79950240000. Its totient is φ = 52824408448.

The previous prime is 66327771143. The next prime is 66327771161. The reversal of 66327771145 is 54117772366.

66327771145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 66327771145 - 2¹ = 66327771143 is a prime.

It is a super-2 number, since 2×66327771145² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66327771143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5549586 + ... + 5561524.

It is an arithmetic number, because the mean of its divisors is an integer number (4996890000).

Almost surely, 2^66327771145 is an apocalyptic number.

It is an amenable number.

66327771145 is a deficient number, since it is larger than the sum of its proper divisors (13622468855).

66327771145 is a wasteful number, since it uses less digits than its factorization.

66327771145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16832.

The product of its digits is 1481760, while the sum is 49.

It can be divided in two parts, 6632 and 7771145, that added together give a palindrome (7777777).

The spelling of 66327771145 in words is "sixty-six billion, three hundred twenty-seven million, seven hundred seventy-one thousand, one hundred forty-five".