71466565 has 4 divisors (see below), whose sum is σ = 85759884. Its totient is φ = 57173248.

The previous prime is 71466547. The next prime is 71466601. The reversal of 71466565 is 56566417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56566417 = 3253 ⋅17389.

It can be written as a sum of positive squares in 2 ways, for example, as 45077796 + 26388769 = 6714^2 + 5137^2 .

It is a cyclic number.

It is not a de Polignac number, because 71466565 - 2⁵ = 71466533 is a prime.

It is a Duffinian number.

It is a congruent 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, 7146652 + ... + 7146661.

It is an arithmetic number, because the mean of its divisors is an integer number (21439971).

Almost surely, 2^71466565 is an apocalyptic number.

It is an amenable number.

71466565 is a deficient number, since it is larger than the sum of its proper divisors (14293319).

71466565 is a wasteful number, since it uses less digits than its factorization.

71466565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14293318.

The product of its digits is 151200, while the sum is 40.

The square root of 71466565 is about 8453.7899784653. The cubic root of 71466565 is about 414.9868191488.

The spelling of 71466565 in words is "seventy-one million, four hundred sixty-six thousand, five hundred sixty-five".