66673271 has 12 divisors (see below), whose sum is σ = 77963688. Its totient is φ = 56850192.

The previous prime is 66673267. The next prime is 66673273. The reversal of 66673271 is 17237666.

It is not a de Polignac number, because 66673271 - 2² = 66673267 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 (66673273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6200 + ... + 13106.

It is an arithmetic number, because the mean of its divisors is an integer number (6496974).

Almost surely, 2^66673271 is an apocalyptic number.

66673271 is a deficient number, since it is larger than the sum of its proper divisors (11290417).

66673271 is a wasteful number, since it uses less digits than its factorization.

66673271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118 (or 7111 counting only the distinct ones).

The product of its digits is 63504, while the sum is 38.

The square root of 66673271 is about 8165.3702304305. The cubic root of 66673271 is about 405.4935222259.

It can be divided in two parts, 666 and 73271, that added together give a palindrome (73937).

The spelling of 66673271 in words is "sixty-six million, six hundred seventy-three thousand, two hundred seventy-one".