71820079129066 has 8 divisors (see below), whose sum is σ = 107843161843044. Its totient is φ = 35872358514720.

The previous prime is 71820079129061. The next prime is 71820079129109. The reversal of 71820079129066 is 66092197002817.

It can be written as a sum of positive squares in 2 ways, for example, as 63852325285225 + 7967753843841 = 7990765^2 + 2822721^2 .

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

It is a super-2 number, since 2×71820079129066² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71820079129066.

It is not an unprimeable number, because it can be changed into a prime (71820079129061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18840522525 + ... + 18840526336.

Almost surely, 2^{71820079129066} is an apocalyptic number.

71820079129066 is a deficient number, since it is larger than the sum of its proper divisors (36023082713978).

71820079129066 is a wasteful number, since it uses less digits than its factorization.

71820079129066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37681049816.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 71820079129066 in words is "seventy-one trillion, eight hundred twenty billion, seventy-nine million, one hundred twenty-nine thousand, sixty-six".