71113665 has 32 divisors (see below), whose sum is σ = 130452480. Its totient is φ = 32405184.

The previous prime is 71113663. The next prime is 71113687. The reversal of 71113665 is 56631117.

It is not a de Polignac number, because 71113665 - 2¹ = 71113663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71113661) 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 31 ways as a sum of consecutive naturals, for example, 38902 + ... + 40688.

It is an arithmetic number, because the mean of its divisors is an integer number (4076640).

Almost surely, 2^71113665 is an apocalyptic number.

It is an amenable number.

71113665 is a deficient number, since it is larger than the sum of its proper divisors (59338815).

71113665 is a wasteful number, since it uses less digits than its factorization.

71113665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181.

The product of its digits is 3780, while the sum is 30.

The square root of 71113665 is about 8432.8918527395. The cubic root of 71113665 is about 414.3026271052.

The spelling of 71113665 in words is "seventy-one million, one hundred thirteen thousand, six hundred sixty-five".