72066571 has 2 divisors, whose sum is σ = 72066572. Its totient is φ = 72066570.

The previous prime is 72066569. The next prime is 72066619. The reversal of 72066571 is 17566027.

It is a weak prime.

It is an emirp because it is prime and its reverse (17566027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72066571 - 2¹ = 72066569 is a prime.

Together with 72066569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72066551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36033285 + 36033286.

It is an arithmetic number, because the mean of its divisors is an integer number (36033286).

Almost surely, 2^72066571 is an apocalyptic number.

72066571 is a deficient number, since it is larger than the sum of its proper divisors (1).

72066571 is an equidigital number, since it uses as much as digits as its factorization.

72066571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 72066571 is about 8489.2032017145. The cubic root of 72066571 is about 416.1449410963.

The spelling of 72066571 in words is "seventy-two million, sixty-six thousand, five hundred seventy-one".