71667543 has 8 divisors (see below), whose sum is σ = 95707008. Its totient is φ = 47703224.

The previous prime is 71667451. The next prime is 71667569. The reversal of 71667543 is 34576617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71667543 - 2¹² = 71663447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71667143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16521 + ... + 20402.

It is an arithmetic number, because the mean of its divisors is an integer number (11963376).

Almost surely, 2^71667543 is an apocalyptic number.

71667543 is a deficient number, since it is larger than the sum of its proper divisors (24039465).

71667543 is a wasteful number, since it uses less digits than its factorization.

71667543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37573.

The product of its digits is 105840, while the sum is 39.

The square root of 71667543 is about 8465.6684910289. The cubic root of 71667543 is about 415.3754631755.

The spelling of 71667543 in words is "seventy-one million, six hundred sixty-seven thousand, five hundred forty-three".