1665042414 has 16 divisors (see below), whose sum is σ = 3805811328. Its totient is φ = 475726392.

The previous prime is 1665042413. The next prime is 1665042419. The reversal of 1665042414 is 4142405661.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665042413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19821892 + ... + 19821975.

It is an arithmetic number, because the mean of its divisors is an integer number (237863208).

Almost surely, 2^1665042414 is an apocalyptic number.

1665042414 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1665042414 is an abundant number, since it is smaller than the sum of its proper divisors (2140768914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665042414 is a wasteful number, since it uses less digits than its factorization.

1665042414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39643879.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1665042414 is about 40804.9312461129. The cubic root of 1665042414 is about 1185.2458234161.

The spelling of 1665042414 in words is "one billion, six hundred sixty-five million, forty-two thousand, four hundred fourteen".