42066671 has 2 divisors, whose sum is σ = 42066672. Its totient is φ = 42066670.

The previous prime is 42066643. The next prime is 42066677. The reversal of 42066671 is 17666024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42066671 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42066677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21033335 + 21033336.

It is an arithmetic number, because the mean of its divisors is an integer number (21033336).

Almost surely, 2^42066671 is an apocalyptic number.

42066671 is a deficient number, since it is larger than the sum of its proper divisors (1).

42066671 is an equidigital number, since it uses as much as digits as its factorization.

42066671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 42066671 is about 6485.8824380342. The cubic root of 42066671 is about 347.7864959596.

The spelling of 42066671 in words is "forty-two million, sixty-six thousand, six hundred seventy-one".