43660416346661 has 4 divisors (see below), whose sum is σ = 44213079844800. Its totient is φ = 43107752848524.

The previous prime is 43660416346567. The next prime is 43660416346709. The reversal of 43660416346661 is 16664361406634.

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 a de Polignac number, because none of the positive numbers 2^k-43660416346661 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43660416346597 and 43660416346606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43660416346861) 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, 276331748951 + ... + 276331749108.

It is an arithmetic number, because the mean of its divisors is an integer number (11053269961200).

Almost surely, 2^{43660416346661} is an apocalyptic number.

It is an amenable number.

43660416346661 is a deficient number, since it is larger than the sum of its proper divisors (552663498139).

43660416346661 is an equidigital number, since it uses as much as digits as its factorization.

43660416346661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552663498138.

The product of its (nonzero) digits is 26873856, while the sum is 56.

The spelling of 43660416346661 in words is "forty-three trillion, six hundred sixty billion, four hundred sixteen million, three hundred forty-six thousand, six hundred sixty-one".