42650665 has 4 divisors (see below), whose sum is σ = 51180804. Its totient is φ = 34120528.

The previous prime is 42650653. The next prime is 42650681. The reversal of 42650665 is 56605624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28430224 + 14220441 = 5332^2 + 3771^2 .

It is a cyclic number.

It is not a de Polignac number, because 42650665 - 2⁵ = 42650633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42650665.

It is an unprimeable number.

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, 4265062 + ... + 4265071.

It is an arithmetic number, because the mean of its divisors is an integer number (12795201).

Almost surely, 2^42650665 is an apocalyptic number.

It is an amenable number.

42650665 is a deficient number, since it is larger than the sum of its proper divisors (8530139).

42650665 is an equidigital number, since it uses as much as digits as its factorization.

42650665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8530138.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 42650665 is about 6530.7476601075. The cubic root of 42650665 is about 349.3884968592.

The spelling of 42650665 in words is "forty-two million, six hundred fifty thousand, six hundred sixty-five".