71397966 has 8 divisors (see below), whose sum is σ = 142795944. Its totient is φ = 23799320.

The previous prime is 71397959. The next prime is 71397967. The reversal of 71397966 is 66979317.

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

71397966 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71397967) 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 3 ways as a sum of consecutive naturals, for example, 5949825 + ... + 5949836.

It is an arithmetic number, because the mean of its divisors is an integer number (17849493).

Almost surely, 2^71397966 is an apocalyptic number.

71397966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71397966 is a wasteful number, since it uses less digits than its factorization.

71397966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11899666.

The product of its digits is 428652, while the sum is 48.

The square root of 71397966 is about 8449.7317117172. The cubic root of 71397966 is about 414.8539980916.

The spelling of 71397966 in words is "seventy-one million, three hundred ninety-seven thousand, nine hundred sixty-six".