71656085 has 4 divisors (see below), whose sum is σ = 85987308. Its totient is φ = 57324864.

The previous prime is 71656073. The next prime is 71656093. The reversal of 71656085 is 58065617.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41964484 + 29691601 = 6478^2 + 5449^2 .

It is a cyclic number.

It is not a de Polignac number, because 71656085 - 2¹² = 71651989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 7165604 + ... + 7165613.

It is an arithmetic number, because the mean of its divisors is an integer number (21496827).

Almost surely, 2^71656085 is an apocalyptic number.

It is an amenable number.

71656085 is a deficient number, since it is larger than the sum of its proper divisors (14331223).

71656085 is a wasteful number, since it uses less digits than its factorization.

71656085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14331222.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 71656085 is about 8464.9917306516. The cubic root of 71656085 is about 415.3533256521.

The spelling of 71656085 in words is "seventy-one million, six hundred fifty-six thousand, eighty-five".