71218667 has 8 divisors (see below), whose sum is σ = 76770624. Its totient is φ = 65677248.

The previous prime is 71218663. The next prime is 71218691. The reversal of 71218667 is 76681217.

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

It is not a de Polignac number, because 71218667 - 2² = 71218663 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71218667.

It is not an unprimeable number, because it can be changed into a prime (71218663) 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 7 ways as a sum of consecutive naturals, for example, 16718 + ... + 20540.

It is an arithmetic number, because the mean of its divisors is an integer number (9596328).

Almost surely, 2^71218667 is an apocalyptic number.

71218667 is a deficient number, since it is larger than the sum of its proper divisors (5551957).

71218667 is a wasteful number, since it uses less digits than its factorization.

71218667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269.

The product of its digits is 28224, while the sum is 38.

The square root of 71218667 is about 8439.1152972335. The cubic root of 71218667 is about 414.5064379618.

The spelling of 71218667 in words is "seventy-one million, two hundred eighteen thousand, six hundred sixty-seven".