71668273 has 4 divisors (see below), whose sum is σ = 71714160. Its totient is φ = 71622388.

The previous prime is 71668271. The next prime is 71668283. The reversal of 71668273 is 37286617.

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 71668273 - 2¹ = 71668271 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71668271) 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, 20515 + ... + 23752.

It is an arithmetic number, because the mean of its divisors is an integer number (17928540).

Almost surely, 2^71668273 is an apocalyptic number.

It is an amenable number.

71668273 is a deficient number, since it is larger than the sum of its proper divisors (45887).

71668273 is a wasteful number, since it uses less digits than its factorization.

71668273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45886.

The product of its digits is 84672, while the sum is 40.

The square root of 71668273 is about 8465.7116062384. The cubic root of 71668273 is about 415.3768734980.

The spelling of 71668273 in words is "seventy-one million, six hundred sixty-eight thousand, two hundred seventy-three".