71662741 has 8 divisors (see below), whose sum is σ = 74240280. Its totient is φ = 69092352.

The previous prime is 71662729. The next prime is 71662763. The reversal of 71662741 is 14726617.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11662225 + 60000516 = 3415^2 + 7746^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71662741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71662697 and 71662706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71662441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26341 + ... + 28933.

It is an arithmetic number, because the mean of its divisors is an integer number (9280035).

Almost surely, 2^71662741 is an apocalyptic number.

It is an amenable number.

71662741 is a deficient number, since it is larger than the sum of its proper divisors (2577539).

71662741 is a wasteful number, since it uses less digits than its factorization.

71662741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575.

The product of its digits is 14112, while the sum is 34.

The square root of 71662741 is about 8465.3848701639. The cubic root of 71662741 is about 415.3661857190.

The spelling of 71662741 in words is "seventy-one million, six hundred sixty-two thousand, seven hundred forty-one".