42665344 has 16 divisors (see below), whose sum is σ = 84997620. Its totient is φ = 21332608.

The previous prime is 42665339. The next prime is 42665369. The reversal of 42665344 is 44356624.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166534 + ... + 166789.

Almost surely, 2^42665344 is an apocalyptic number.

It is an amenable number.

42665344 is a deficient number, since it is larger than the sum of its proper divisors (42332276).

42665344 is an equidigital number, since it uses as much as digits as its factorization.

42665344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333337 (or 333325 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 42665344 is about 6531.8714010611. The cubic root of 42665344 is about 349.4285750580.

The spelling of 42665344 in words is "forty-two million, six hundred sixty-five thousand, three hundred forty-four".