66420601562111 has 4 divisors (see below), whose sum is σ = 66422261577672. Its totient is φ = 66418941546552.

The previous prime is 66420601562039. The next prime is 66420601562141. The reversal of 66420601562111 is 11126510602466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66420601562111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66420601562141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829947761 + ... + 830027786.

It is an arithmetic number, because the mean of its divisors is an integer number (16605565394418).

Almost surely, 2^{66420601562111} is an apocalyptic number.

66420601562111 is a deficient number, since it is larger than the sum of its proper divisors (1660015561).

66420601562111 is a wasteful number, since it uses less digits than its factorization.

66420601562111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660015560.

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 66420601562111 in words is "sixty-six trillion, four hundred twenty billion, six hundred one million, five hundred sixty-two thousand, one hundred eleven".