71668387 has 8 divisors (see below), whose sum is σ = 82025216. Its totient is φ = 61341192.

The previous prime is 71668343. The next prime is 71668393. The reversal of 71668387 is 78386617.

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 71668387 - 2²³ = 63279779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71668307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1953 + ... + 12130.

It is an arithmetic number, because the mean of its divisors is an integer number (10253152).

Almost surely, 2^71668387 is an apocalyptic number.

71668387 is a deficient number, since it is larger than the sum of its proper divisors (10356829).

71668387 is a wasteful number, since it uses less digits than its factorization.

71668387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14817.

The product of its digits is 338688, while the sum is 46.

The square root of 71668387 is about 8465.7183392787. The cubic root of 71668387 is about 415.3770937393.

The spelling of 71668387 in words is "seventy-one million, six hundred sixty-eight thousand, three hundred eighty-seven".