42666213 has 4 divisors (see below), whose sum is σ = 56888288. Its totient is φ = 28444140.

The previous prime is 42666193. The next prime is 42666223. The reversal of 42666213 is 31266624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42666213 - 2⁶ = 42666149 is a prime.

It is a super-2 number, since 2×42666213² = 3640811463522738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42666223) 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 in 3 ways as a sum of consecutive naturals, for example, 7111033 + ... + 7111038.

It is an arithmetic number, because the mean of its divisors is an integer number (14222072).

Almost surely, 2^42666213 is an apocalyptic number.

It is an amenable number.

42666213 is a deficient number, since it is larger than the sum of its proper divisors (14222075).

42666213 is a wasteful number, since it uses less digits than its factorization.

42666213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14222074.

The product of its digits is 10368, while the sum is 30.

The square root of 42666213 is about 6531.9379207093. The cubic root of 42666213 is about 349.4309474078.

It can be divided in two parts, 4266621 and 3, that added together give a palindrome (4266624).

The spelling of 42666213 in words is "forty-two million, six hundred sixty-six thousand, two hundred thirteen".