66012043 has 2 divisors, whose sum is σ = 66012044. Its totient is φ = 66012042.

The previous prime is 66012031. The next prime is 66012119. The reversal of 66012043 is 34021066.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66012043 is a prime.

It is not a weakly prime, because it can be changed into another prime (66012643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33006021 + 33006022.

It is an arithmetic number, because the mean of its divisors is an integer number (33006022).

Almost surely, 2^66012043 is an apocalyptic number.

66012043 is a deficient number, since it is larger than the sum of its proper divisors (1).

66012043 is an equidigital number, since it uses as much as digits as its factorization.

66012043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 66012043 is about 8124.7795662406. The cubic root of 66012043 is about 404.1485806954.

The spelling of 66012043 in words is "sixty-six million, twelve thousand, forty-three".