1166785025 has 12 divisors (see below), whose sum is σ = 1653501312. Its totient is φ = 800081040.

The previous prime is 1166785019. The next prime is 1166785063. The reversal of 1166785025 is 5205876611.

It is not a de Polignac number, because 1166785025 - 2²⁰ = 1165736449 is a prime.

It is a super-2 number, since 2×1166785025² = 2722774589128501250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3333497 + ... + 3333846.

It is an arithmetic number, because the mean of its divisors is an integer number (137791776).

Almost surely, 2^1166785025 is an apocalyptic number.

It is an amenable number.

1166785025 is a deficient number, since it is larger than the sum of its proper divisors (486716287).

1166785025 is an equidigital number, since it uses as much as digits as its factorization.

1166785025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667360 (or 6667355 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 1166785025 is about 34158.2350978501. The cubic root of 1166785025 is about 1052.7621981101.

The spelling of 1166785025 in words is "one billion, one hundred sixty-six million, seven hundred eighty-five thousand, twenty-five".