43416661 has 4 divisors (see below), whose sum is σ = 43516000. Its totient is φ = 43317324.

The previous prime is 43416649. The next prime is 43416727. The reversal of 43416661 is 16661434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43416661 - 2¹⁷ = 43285589 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 (43416631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49011 + ... + 49888.

It is an arithmetic number, because the mean of its divisors is an integer number (10879000).

Almost surely, 2^43416661 is an apocalyptic number.

It is an amenable number.

43416661 is a deficient number, since it is larger than the sum of its proper divisors (99339).

43416661 is an equidigital number, since it uses as much as digits as its factorization.

43416661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99338.

The product of its digits is 10368, while the sum is 31.

The square root of 43416661 is about 6589.1320369226. The cubic root of 43416661 is about 351.4677438165.

The spelling of 43416661 in words is "forty-three million, four hundred sixteen thousand, six hundred sixty-one".