66575143 has 2 divisors, whose sum is σ = 66575144. Its totient is φ = 66575142.

The previous prime is 66575101. The next prime is 66575147. The reversal of 66575143 is 34157566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66575143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66575147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33287571 + 33287572.

It is an arithmetic number, because the mean of its divisors is an integer number (33287572).

Almost surely, 2^66575143 is an apocalyptic number.

66575143 is a deficient number, since it is larger than the sum of its proper divisors (1).

66575143 is an equidigital number, since it uses as much as digits as its factorization.

66575143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The square root of 66575143 is about 8159.3592272923. The cubic root of 66575143 is about 405.2944929173.

The spelling of 66575143 in words is "sixty-six million, five hundred seventy-five thousand, one hundred forty-three".