71667223 has 4 divisors (see below), whose sum is σ = 75882960. Its totient is φ = 67451488.

The previous prime is 71667217. The next prime is 71667293. The reversal of 71667223 is 32276617.

It is a happy number.

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 71667223 - 2⁵ = 71667191 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 (71667293) 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, 2107843 + ... + 2107876.

It is an arithmetic number, because the mean of its divisors is an integer number (18970740).

Almost surely, 2^71667223 is an apocalyptic number.

71667223 is a deficient number, since it is larger than the sum of its proper divisors (4215737).

71667223 is a wasteful number, since it uses less digits than its factorization.

71667223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215736.

The product of its digits is 21168, while the sum is 34.

The square root of 71667223 is about 8465.6495911418. The cubic root of 71667223 is about 415.3748449489.

The spelling of 71667223 in words is "seventy-one million, six hundred sixty-seven thousand, two hundred twenty-three".