1165713120666 has 48 divisors (see below), whose sum is σ = 2619657305928. Its totient is φ = 374325840000.

The previous prime is 1165713120661. The next prime is 1165713120667. The reversal of 1165713120666 is 6660213175611.

It can be written as a sum of positive squares in 4 ways, for example, as 1165654919025 + 58201641 = 1079655^2 + 7629^2 .

It is not an unprimeable number, because it can be changed into a prime (1165713120661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8597685 + ... + 8732216.

Almost surely, 2^{1165713120666} is an apocalyptic number.

1165713120666 is an abundant number, since it is smaller than the sum of its proper divisors (1453944185262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1165713120666 is a wasteful number, since it uses less digits than its factorization.

1165713120666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17330047 (or 17330044 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

Subtracting 1165713120666 from its reverse (6660213175611), we obtain a palindrome (5494500054945).

The spelling of 1165713120666 in words is "one trillion, one hundred sixty-five billion, seven hundred thirteen million, one hundred twenty thousand, six hundred sixty-six".