66572543 has 2 divisors, whose sum is σ = 66572544. Its totient is φ = 66572542.

The previous prime is 66572537. The next prime is 66572551. The reversal of 66572543 is 34527566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66572543 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 66572497 and 66572506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66572503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33286271 + 33286272.

It is an arithmetic number, because the mean of its divisors is an integer number (33286272).

Almost surely, 2^66572543 is an apocalyptic number.

66572543 is a deficient number, since it is larger than the sum of its proper divisors (1).

66572543 is an equidigital number, since it uses as much as digits as its factorization.

66572543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 38.

The square root of 66572543 is about 8159.1998995000. The cubic root of 66572543 is about 405.2892167769.

The spelling of 66572543 in words is "sixty-six million, five hundred seventy-two thousand, five hundred forty-three".