66081055 has 8 divisors (see below), whose sum is σ = 79431552. Its totient is φ = 52775328.

The previous prime is 66081019. The next prime is 66081061. The reversal of 66081055 is 55018066.

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

It is a cyclic number.

It is not a de Polignac number, because 66081055 - 2¹¹ = 66079007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7852 + ... + 13921.

It is an arithmetic number, because the mean of its divisors is an integer number (9928944).

Almost surely, 2^66081055 is an apocalyptic number.

66081055 is a deficient number, since it is larger than the sum of its proper divisors (13350497).

66081055 is a wasteful number, since it uses less digits than its factorization.

66081055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22385.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 66081055 is about 8129.0254643469. The cubic root of 66081055 is about 404.2893700962.

The spelling of 66081055 in words is "sixty-six million, eighty-one thousand, fifty-five".