66711070373671 has 4 divisors (see below), whose sum is σ = 67398813367312. Its totient is φ = 66023327380032.

The previous prime is 66711070373669. The next prime is 66711070373693. The reversal of 66711070373671 is 17637307011766.

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

It is a cyclic number.

It is not a de Polignac number, because 66711070373671 - 2¹ = 66711070373669 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 (66711070373611) 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, 343871496675 + ... + 343871496868.

It is an arithmetic number, because the mean of its divisors is an integer number (16849703341828).

Almost surely, 2^{66711070373671} is an apocalyptic number.

66711070373671 is a deficient number, since it is larger than the sum of its proper divisors (687742993641).

66711070373671 is an equidigital number, since it uses as much as digits as its factorization.

66711070373671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687742993640.

The product of its (nonzero) digits is 4667544, while the sum is 55.

The spelling of 66711070373671 in words is "sixty-six trillion, seven hundred eleven billion, seventy million, three hundred seventy-three thousand, six hundred seventy-one".