71661116 has 12 divisors (see below), whose sum is σ = 126649320. Its totient is φ = 35475600.

The previous prime is 71661113. The next prime is 71661131. The reversal of 71661116 is 61116617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71661113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88286 + ... + 89093.

It is an arithmetic number, because the mean of its divisors is an integer number (10554110).

Almost surely, 2^71661116 is an apocalyptic number.

It is an amenable number.

71661116 is a deficient number, since it is larger than the sum of its proper divisors (54988204).

71661116 is a wasteful number, since it uses less digits than its factorization.

71661116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177484 (or 177482 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 71661116 is about 8465.2888905223. The cubic root of 71661116 is about 415.3630461277.

The spelling of 71661116 in words is "seventy-one million, six hundred sixty-one thousand, one hundred sixteen".