71668219 has 8 divisors (see below), whose sum is σ = 82010880. Its totient is φ = 61351656.

The previous prime is 71668189. The next prime is 71668231. The reversal of 71668219 is 91286617.

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 71668219 - 2⁹ = 71667707 is a prime.

It is a super-2 number, since 2×71668219² = 10272667229263922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71608219) 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, 229 + ... + 11974.

It is an arithmetic number, because the mean of its divisors is an integer number (10251360).

Almost surely, 2^71668219 is an apocalyptic number.

71668219 is a deficient number, since it is larger than the sum of its proper divisors (10342661).

71668219 is a wasteful number, since it uses less digits than its factorization.

71668219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13049.

The product of its digits is 36288, while the sum is 40.

The square root of 71668219 is about 8465.7084169017. The cubic root of 71668219 is about 415.3767691731.

The spelling of 71668219 in words is "seventy-one million, six hundred sixty-eight thousand, two hundred nineteen".