42666697 has 2 divisors, whose sum is σ = 42666698. Its totient is φ = 42666696.

The previous prime is 42666677. The next prime is 42666713. The reversal of 42666697 is 79666624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40182921 + 2483776 = 6339^2 + 1576^2 .

It is a cyclic number.

It is not a de Polignac number, because 42666697 - 2²³ = 34278089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42666667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21333348 + 21333349.

It is an arithmetic number, because the mean of its divisors is an integer number (21333349).

Almost surely, 2^42666697 is an apocalyptic number.

It is an amenable number.

42666697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42666697 is an equidigital number, since it uses as much as digits as its factorization.

42666697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 46.

The square root of 42666697 is about 6531.9749693335. The cubic root of 42666697 is about 349.4322687026.

The spelling of 42666697 in words is "forty-two million, six hundred sixty-six thousand, six hundred ninety-seven".