71668278 has 24 divisors (see below), whose sum is σ = 169398216. Its totient is φ = 21717600.

The previous prime is 71668271. The next prime is 71668283. The reversal of 71668278 is 87286617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71668271) 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 11 ways as a sum of consecutive naturals, for example, 180783 + ... + 181178.

It is an arithmetic number, because the mean of its divisors is an integer number (7058259).

Almost surely, 2^71668278 is an apocalyptic number.

71668278 is an abundant number, since it is smaller than the sum of its proper divisors (97729938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71668278 is a wasteful number, since it uses less digits than its factorization.

71668278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361980 (or 361977 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 71668278 is about 8465.7119015473. The cubic root of 71668278 is about 415.3768831577.

The spelling of 71668278 in words is "seventy-one million, six hundred sixty-eight thousand, two hundred seventy-eight".