43665061 has 16 divisors (see below), whose sum is σ = 50699520. Its totient is φ = 37166080.

The previous prime is 43665053. The next prime is 43665077. The reversal of 43665061 is 16056634.

It is not a de Polignac number, because 43665061 - 2³ = 43665053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43665031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44205 + ... + 45181.

It is an arithmetic number, because the mean of its divisors is an integer number (3168720).

Almost surely, 2^43665061 is an apocalyptic number.

It is an amenable number.

43665061 is a deficient number, since it is larger than the sum of its proper divisors (7034459).

43665061 is a wasteful number, since it uses less digits than its factorization.

43665061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 43665061 is about 6607.9543733292. The cubic root of 43665061 is about 352.1367543915.

The spelling of 43665061 in words is "forty-three million, six hundred sixty-five thousand, sixty-one".