1661260330043 has 16 divisors (see below), whose sum is σ = 1802545418880. Its totient is φ = 1527419972736.

The previous prime is 1661260330019. The next prime is 1661260330063. The reversal of 1661260330043 is 3400330621661.

It is a cyclic number.

It is not a de Polignac number, because 1661260330043 - 2¹² = 1661260325947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1661260329985 and 1661260330012.

It is not an unprimeable number, because it can be changed into a prime (1661260330063) 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, 16420196 + ... + 16521057.

It is an arithmetic number, because the mean of its divisors is an integer number (112659088680).

Almost surely, 2^{1661260330043} is an apocalyptic number.

1661260330043 is a deficient number, since it is larger than the sum of its proper divisors (141285088837).

1661260330043 is a wasteful number, since it uses less digits than its factorization.

1661260330043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32941366.

The product of its (nonzero) digits is 46656, while the sum is 35.

The spelling of 1661260330043 in words is "one trillion, six hundred sixty-one billion, two hundred sixty million, three hundred thirty thousand, forty-three".