66081054 has 16 divisors (see below), whose sum is σ = 142328592. Its totient is φ = 20332608.

The previous prime is 66081019. The next prime is 66081061. The reversal of 66081054 is 45018066.

66081054 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423519 + ... + 423674.

It is an arithmetic number, because the mean of its divisors is an integer number (8895537).

Almost surely, 2^66081054 is an apocalyptic number.

66081054 is an abundant number, since it is smaller than the sum of its proper divisors (76247538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66081054 is a wasteful number, since it uses less digits than its factorization.

66081054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847211.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 66081054 is about 8129.0254028389. The cubic root of 66081054 is about 404.2893680569.

The spelling of 66081054 in words is "sixty-six million, eighty-one thousand, fifty-four".