71668119 has 4 divisors (see below), whose sum is σ = 95557496. Its totient is φ = 47778744.

The previous prime is 71668117. The next prime is 71668139. The reversal of 71668119 is 91186617.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71668119 - 2¹ = 71668117 is a prime.

It is a super-2 number, since 2×71668119² = 10272638561996322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71668117) 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, 11944684 + ... + 11944689.

It is an arithmetic number, because the mean of its divisors is an integer number (23889374).

Almost surely, 2^71668119 is an apocalyptic number.

71668119 is a deficient number, since it is larger than the sum of its proper divisors (23889377).

71668119 is a wasteful number, since it uses less digits than its factorization.

71668119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23889376.

The product of its digits is 18144, while the sum is 39.

The square root of 71668119 is about 8465.7025107194. The cubic root of 71668119 is about 415.3765759787.

The spelling of 71668119 in words is "seventy-one million, six hundred sixty-eight thousand, one hundred nineteen".