71382665 has 8 divisors (see below), whose sum is σ = 86417928. Its totient is φ = 56600320.

The previous prime is 71382653. The next prime is 71382673. The reversal of 71382665 is 56628317.

It can be written as a sum of positive squares in 4 ways, for example, as 6869641 + 64513024 = 2621^2 + 8032^2 .

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

It is not a de Polignac number, because 71382665 - 2¹⁰ = 71381641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62606 + ... + 63735.

It is an arithmetic number, because the mean of its divisors is an integer number (10802241).

Almost surely, 2^71382665 is an apocalyptic number.

It is an amenable number.

71382665 is a deficient number, since it is larger than the sum of its proper divisors (15035263).

71382665 is a wasteful number, since it uses less digits than its factorization.

71382665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126459.

The product of its digits is 60480, while the sum is 38.

The square root of 71382665 is about 8448.8262498409. The cubic root of 71382665 is about 414.8243607650.

The spelling of 71382665 in words is "seventy-one million, three hundred eighty-two thousand, six hundred sixty-five".