66018642867 has 16 divisors (see below), whose sum is σ = 97874868000. Its totient is φ = 43981166592.

The previous prime is 66018642857. The next prime is 66018642889. The reversal of 66018642867 is 76824681066.

66018642867 is a `hidden beast` number, since 6 + 601 + 8 + 6 + 4 + 28 + 6 + 7 = 666.

It is not a de Polignac number, because 66018642867 - 2¹⁴ = 66018626483 is a prime.

It is a super-2 number, since 2×66018642867² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66018642827) 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, 829642 + ... + 905727.

It is an arithmetic number, because the mean of its divisors is an integer number (6117179250).

Almost surely, 2^66018642867 is an apocalyptic number.

66018642867 is a deficient number, since it is larger than the sum of its proper divisors (31856225133).

66018642867 is a wasteful number, since it uses less digits than its factorization.

66018642867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736787 (or 1736781 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

It can be divided in two parts, 6601 and 8642867, that added together give a palindrome (8649468).

The spelling of 66018642867 in words is "sixty-six billion, eighteen million, six hundred forty-two thousand, eight hundred sixty-seven".