43440066 has 24 divisors (see below), whose sum is σ = 99657324. Its totient is φ = 13628160.

The previous prime is 43440029. The next prime is 43440073. The reversal of 43440066 is 66004434.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43362225 + 77841 = 6585^2 + 279^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70675 + ... + 71286.

Almost surely, 2^43440066 is an apocalyptic number.

43440066 is an abundant number, since it is smaller than the sum of its proper divisors (56217258).

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

43440066 is a wasteful number, since it uses less digits than its factorization.

43440066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141986 (or 141983 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 43440066 is about 6590.9078282130. The cubic root of 43440066 is about 351.5308887370.

The spelling of 43440066 in words is "forty-three million, four hundred forty thousand, sixty-six".