66016516066 has 8 divisors (see below), whose sum is σ = 99028342620. Its totient is φ = 33007068528.

The previous prime is 66016516043. The next prime is 66016516067. The reversal of 66016516066 is 66061561066.

It can be written as a sum of positive squares in 2 ways, for example, as 62712680625 + 3303835441 = 250425^2 + 57479^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66016516066² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66016516067) 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, 523681 + ... + 637396.

Almost surely, 2^66016516066 is an apocalyptic number.

66016516066 is a deficient number, since it is larger than the sum of its proper divisors (33011826554).

66016516066 is a wasteful number, since it uses less digits than its factorization.

66016516066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189508.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 66016516066 in words is "sixty-six billion, sixteen million, five hundred sixteen thousand, sixty-six".