71295661 has 4 divisors (see below), whose sum is σ = 71501472. Its totient is φ = 71089852.

The previous prime is 71295649. The next prime is 71295709. The reversal of 71295661 is 16659217.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71295661 - 2⁷ = 71295533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71295661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71295611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102385 + ... + 103078.

It is an arithmetic number, because the mean of its divisors is an integer number (17875368).

Almost surely, 2^71295661 is an apocalyptic number.

It is an amenable number.

71295661 is a deficient number, since it is larger than the sum of its proper divisors (205811).

71295661 is a wasteful number, since it uses less digits than its factorization.

71295661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205810.

The product of its digits is 22680, while the sum is 37.

The square root of 71295661 is about 8443.6757990818. The cubic root of 71295661 is about 414.6557574968.

The spelling of 71295661 in words is "seventy-one million, two hundred ninety-five thousand, six hundred sixty-one".