1663743065 has 16 divisors (see below), whose sum is σ = 2118614400. Its totient is φ = 1251541632.

The previous prime is 1663743047. The next prime is 1663743077. The reversal of 1663743065 is 5603473661.

It is a cyclic number.

It is not a de Polignac number, because 1663743065 - 2²⁰ = 1662694489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115820 + ... + 129389.

It is an arithmetic number, because the mean of its divisors is an integer number (132413400).

Almost surely, 2^1663743065 is an apocalyptic number.

It is an amenable number.

1663743065 is a deficient number, since it is larger than the sum of its proper divisors (454871335).

1663743065 is a wasteful number, since it uses less digits than its factorization.

1663743065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245296.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 1663743065 is about 40789.0066684640. The cubic root of 1663743065 is about 1184.9374331236.

The spelling of 1663743065 in words is "one billion, six hundred sixty-three million, seven hundred forty-three thousand, sixty-five".