66661006011166 has 64 divisors (see below), whose sum is σ = 114692998464000. Its totient is φ = 28465004851200.

The previous prime is 66661006011157. The next prime is 66661006011221. The reversal of 66661006011166 is 66111060016666.

It is a super-2 number, since 2×66661006011166² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11224278225 + ... + 11224284163.

It is an arithmetic number, because the mean of its divisors is an integer number (1792078101000).

Almost surely, 2^{66661006011166} is an apocalyptic number.

66661006011166 is a deficient number, since it is larger than the sum of its proper divisors (48031992452834).

66661006011166 is a wasteful number, since it uses less digits than its factorization.

66661006011166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8977.

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 66661006011166 in words is "sixty-six trillion, six hundred sixty-one billion, six million, eleven thousand, one hundred sixty-six".