1761660745 has 8 divisors (see below), whose sum is σ = 2276607816. Its totient is φ = 1300918656.

The previous prime is 1761660743. The next prime is 1761660773. The reversal of 1761660745 is 5470661671.

It can be written as a sum of positive squares in 4 ways, for example, as 767376 + 1760893369 = 876^2 + 41963^2 .

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 1761660745 - 2¹ = 1761660743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1761660743) by changing a digit.

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, 13551172 + ... + 13551301.

It is an arithmetic number, because the mean of its divisors is an integer number (284575977).

Almost surely, 2^1761660745 is an apocalyptic number.

It is an amenable number.

1761660745 is a deficient number, since it is larger than the sum of its proper divisors (514947071).

1761660745 is a wasteful number, since it uses less digits than its factorization.

1761660745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27102491.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 1761660745 is about 41972.1424876072. The cubic root of 1761660745 is about 1207.7417856738.

The spelling of 1761660745 in words is "one billion, seven hundred sixty-one million, six hundred sixty thousand, seven hundred forty-five".