1165763125666 has 16 divisors (see below), whose sum is σ = 1749451457880. Its totient is φ = 582612710400.

The previous prime is 1165763125649. The next prime is 1165763125699. The reversal of 1165763125666 is 6665213675611.

It can be written as a sum of positive squares in 4 ways, for example, as 990281726641 + 175481399025 = 995129^2 + 418905^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45169966 + ... + 45195766.

Almost surely, 2^{1165763125666} is an apocalyptic number.

1165763125666 is a deficient number, since it is larger than the sum of its proper divisors (583688332214).

1165763125666 is a wasteful number, since it uses less digits than its factorization.

1165763125666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35349.

The product of its digits is 8164800, while the sum is 55.

Subtracting 1165763125666 from its reverse (6665213675611), we obtain a palindrome (5499450549945).

The spelling of 1165763125666 in words is "one trillion, one hundred sixty-five billion, seven hundred sixty-three million, one hundred twenty-five thousand, six hundred sixty-six".