42666321 has 8 divisors (see below), whose sum is σ = 57304224. Its totient is φ = 28236320.

The previous prime is 42666313. The next prime is 42666331. The reversal of 42666321 is 12366624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42666321 - 2³ = 42666313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42666331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51495 + ... + 52316.

It is an arithmetic number, because the mean of its divisors is an integer number (7163028).

Almost surely, 2^42666321 is an apocalyptic number.

It is an amenable number.

42666321 is a deficient number, since it is larger than the sum of its proper divisors (14637903).

42666321 is a wasteful number, since it uses less digits than its factorization.

42666321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103951.

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

The square root of 42666321 is about 6531.9461877759. The cubic root of 42666321 is about 349.4312422431.

The spelling of 42666321 in words is "forty-two million, six hundred sixty-six thousand, three hundred twenty-one".