42648665 has 16 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 31968000.

The previous prime is 42648643. The next prime is 42648667. The reversal of 42648665 is 56684624.

It is not a de Polignac number, because 42648665 - 2⁸ = 42648409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42648667) 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 15 ways as a sum of consecutive naturals, for example, 20336 + ... + 22334.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^42648665 is an apocalyptic number.

It is an amenable number.

42648665 is a deficient number, since it is larger than the sum of its proper divisors (11783335).

42648665 is a wasteful number, since it uses less digits than its factorization.

42648665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272.

The product of its digits is 276480, while the sum is 41.

The square root of 42648665 is about 6530.5945364875. The cubic root of 42648665 is about 349.3830355304.

The spelling of 42648665 in words is "forty-two million, six hundred forty-eight thousand, six hundred sixty-five".