42666347 has 2 divisors, whose sum is σ = 42666348. Its totient is φ = 42666346.

The previous prime is 42666331. The next prime is 42666353. The reversal of 42666347 is 74366624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42666347 - 2⁴ = 42666331 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42666347.

It is not a weakly prime, because it can be changed into another prime (42666397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21333173 + 21333174.

It is an arithmetic number, because the mean of its divisors is an integer number (21333174).

Almost surely, 2^42666347 is an apocalyptic number.

42666347 is a deficient number, since it is larger than the sum of its proper divisors (1).

42666347 is an equidigital number, since it uses as much as digits as its factorization.

42666347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 38.

The square root of 42666347 is about 6531.9481779941. The cubic root of 42666347 is about 349.4313132219.

The spelling of 42666347 in words is "forty-two million, six hundred sixty-six thousand, three hundred forty-seven".