1766005345 has 8 divisors (see below), whose sum is σ = 2282222376. Its totient is φ = 1304126976.

The previous prime is 1766005337. The next prime is 1766005403. The reversal of 1766005345 is 5435006671.

It can be written as a sum of positive squares in 4 ways, for example, as 87628321 + 1678377024 = 9361^2 + 40968^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1766005345 - 2³ = 1766005337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13584592 + ... + 13584721.

It is an arithmetic number, because the mean of its divisors is an integer number (285277797).

Almost surely, 2^1766005345 is an apocalyptic number.

It is an amenable number.

1766005345 is a deficient number, since it is larger than the sum of its proper divisors (516217031).

1766005345 is a wasteful number, since it uses less digits than its factorization.

1766005345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27169331.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 1766005345 is about 42023.8663737643. The cubic root of 1766005345 is about 1208.7338131065.

The spelling of 1766005345 in words is "one billion, seven hundred sixty-six million, five thousand, three hundred forty-five".