72066557727 has 6 divisors (see below), whose sum is σ = 104096138952. Its totient is φ = 48044371812.

The previous prime is 72066557713. The next prime is 72066557729. The reversal of 72066557727 is 72775566027.

It is a happy number.

72066557727 is a `hidden beast` number, since 7 + 2 + 0 + 6 + 65 + 577 + 2 + 7 = 666.

It is not a de Polignac number, because 72066557727 - 2¹⁰ = 72066556703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72066557729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4003697643 + ... + 4003697660.

It is an arithmetic number, because the mean of its divisors is an integer number (17349356492).

Almost surely, 2^72066557727 is an apocalyptic number.

72066557727 is a deficient number, since it is larger than the sum of its proper divisors (32029581225).

72066557727 is a wasteful number, since it uses less digits than its factorization.

72066557727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8007395309 (or 8007395306 counting only the distinct ones).

The product of its (nonzero) digits is 8643600, while the sum is 54.

The spelling of 72066557727 in words is "seventy-two billion, sixty-six million, five hundred fifty-seven thousand, seven hundred twenty-seven".