66325661061 has 16 divisors (see below), whose sum is σ = 96817025088. Its totient is φ = 40054313600.

The previous prime is 66325661029. The next prime is 66325661099. The reversal of 66325661061 is 16016652366.

It is a cyclic number.

It is not a de Polignac number, because 66325661061 - 2⁵ = 66325661029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66325661161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3567006 + ... + 3585551.

It is an arithmetic number, because the mean of its divisors is an integer number (6051064068).

Almost surely, 2^66325661061 is an apocalyptic number.

It is an amenable number.

66325661061 is a deficient number, since it is larger than the sum of its proper divisors (30491364027).

66325661061 is a wasteful number, since it uses less digits than its factorization.

66325661061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152852.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 66325661061 in words is "sixty-six billion, three hundred twenty-five million, six hundred sixty-one thousand, sixty-one".