66080671 has 4 divisors (see below), whose sum is σ = 66096952. Its totient is φ = 66064392.

The previous prime is 66080659. The next prime is 66080711. The reversal of 66080671 is 17608066.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66080671 - 2⁵ = 66080639 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 (66080171) 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, 3436 + ... + 11998.

It is an arithmetic number, because the mean of its divisors is an integer number (16524238).

Almost surely, 2^66080671 is an apocalyptic number.

66080671 is a deficient number, since it is larger than the sum of its proper divisors (16281).

66080671 is an equidigital number, since it uses as much as digits as its factorization.

66080671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16280.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 66080671 is about 8129.0018452452. The cubic root of 66080671 is about 404.2885869801.

The spelling of 66080671 in words is "sixty-six million, eighty thousand, six hundred seventy-one".