71664166 has 12 divisors (see below), whose sum is σ = 125046828. Its totient is φ = 30713172.

The previous prime is 71664149. The next prime is 71664169. The reversal of 71664166 is 66146617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71664169) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 365536 + ... + 365731.

It is an arithmetic number, because the mean of its divisors is an integer number (10420569).

Almost surely, 2^71664166 is an apocalyptic number.

71664166 is a deficient number, since it is larger than the sum of its proper divisors (53382662).

71664166 is a wasteful number, since it uses less digits than its factorization.

71664166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731283 (or 731276 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 71664166 is about 8465.4690360310. The cubic root of 71664166 is about 415.3689388600.

The spelling of 71664166 in words is "seventy-one million, six hundred sixty-four thousand, one hundred sixty-six".