66110067061321 has 4 divisors (see below), whose sum is σ = 66134561346000. Its totient is φ = 66085572776644.

The previous prime is 66110067061303. The next prime is 66110067061369. The reversal of 66110067061321 is 12316076001166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66110067061321 - 2¹⁹ = 66110066537033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66110067061391) 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 3 ways as a sum of consecutive naturals, for example, 12247138291 + ... + 12247143688.

It is an arithmetic number, because the mean of its divisors is an integer number (16533640336500).

Almost surely, 2^{66110067061321} is an apocalyptic number.

It is an amenable number.

66110067061321 is a deficient number, since it is larger than the sum of its proper divisors (24494284679).

66110067061321 is a wasteful number, since it uses less digits than its factorization.

66110067061321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24494284678.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 66110067061321 in words is "sixty-six trillion, one hundred ten billion, sixty-seven million, sixty-one thousand, three hundred twenty-one".