2661056043 has 8 divisors (see below), whose sum is σ = 3549460800. Its totient is φ = 1773344328.

The previous prime is 2661056023. The next prime is 2661056051. The reversal of 2661056043 is 3406501662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2661056043 - 2¹⁸ = 2660793899 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2661055995 and 2661056013.

It is not an unprimeable number, because it can be changed into a prime (2661056003) 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, 164233 + ... + 179706.

It is an arithmetic number, because the mean of its divisors is an integer number (443682600).

Almost surely, 2^2661056043 is an apocalyptic number.

2661056043 is a deficient number, since it is larger than the sum of its proper divisors (888404757).

2661056043 is a wasteful number, since it uses less digits than its factorization.

2661056043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346521.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 2661056043 is about 51585.4247147389. The cubic root of 2661056043 is about 1385.7493185344.

The spelling of 2661056043 in words is "two billion, six hundred sixty-one million, fifty-six thousand, forty-three".