71030665 has 4 divisors (see below), whose sum is σ = 85236804. Its totient is φ = 56824528.

The previous prime is 71030651. The next prime is 71030671. The reversal of 71030665 is 56603017.

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 9815689 + 61214976 = 3133^2 + 7824^2 .

It is a cyclic number.

It is not a de Polignac number, because 71030665 - 2⁷ = 71030537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7103062 + ... + 7103071.

It is an arithmetic number, because the mean of its divisors is an integer number (21309201).

Almost surely, 2^71030665 is an apocalyptic number.

It is an amenable number.

71030665 is a deficient number, since it is larger than the sum of its proper divisors (14206139).

71030665 is a wasteful number, since it uses less digits than its factorization.

71030665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14206138.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 71030665 is about 8427.9692097207. The cubic root of 71030665 is about 414.1413805291.

It can be divided in two parts, 710 and 30665, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 71030665 in words is "seventy-one million, thirty thousand, six hundred sixty-five".