1173165209066 has 4 divisors (see below), whose sum is σ = 1759747813602. Its totient is φ = 586582604532.

The previous prime is 1173165209057. The next prime is 1173165209087. The reversal of 1173165209066 is 6609025613711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 872395228441 + 300769980625 = 934021^2 + 548425^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1173165209066.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 293291302265 + ... + 293291302268.

Almost surely, 2^{1173165209066} is an apocalyptic number.

1173165209066 is a deficient number, since it is larger than the sum of its proper divisors (586582604536).

1173165209066 is an equidigital number, since it uses as much as digits as its factorization.

1173165209066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586582604535.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 1173165209066 in words is "one trillion, one hundred seventy-three billion, one hundred sixty-five million, two hundred nine thousand, sixty-six".