71662577605 has 8 divisors (see below), whose sum is σ = 86009507064. Its totient is φ = 57320452800.

The previous prime is 71662577603. The next prime is 71662577617. The reversal of 71662577605 is 50677526617.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9231558561 + 62431019044 = 96081^2 + 249862^2 .

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

It is not a de Polignac number, because 71662577605 - 2¹ = 71662577603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71662577603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168266 + ... + 1228075.

It is an arithmetic number, because the mean of its divisors is an integer number (10751188383).

Almost surely, 2^71662577605 is an apocalyptic number.

It is an amenable number.

71662577605 is a deficient number, since it is larger than the sum of its proper divisors (14346929459).

71662577605 is a wasteful number, since it uses less digits than its factorization.

71662577605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402327.

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 71662577605 in words is "seventy-one billion, six hundred sixty-two million, five hundred seventy-seven thousand, six hundred five".