1166211655 has 16 divisors (see below), whose sum is σ = 1654528320. Its totient is φ = 772111872.

The previous prime is 1166211647. The next prime is 1166211703. The reversal of 1166211655 is 5561126611.

It is not a de Polignac number, because 1166211655 - 2³ = 1166211647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1166211655.

It is a congruent number.

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, 573474 + ... + 575503.

It is an arithmetic number, because the mean of its divisors is an integer number (103408020).

Almost surely, 2^1166211655 is an apocalyptic number.

1166211655 is a deficient number, since it is larger than the sum of its proper divisors (488316665).

1166211655 is a wasteful number, since it uses less digits than its factorization.

1166211655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149018.

The product of its digits is 10800, while the sum is 34.

The square root of 1166211655 is about 34149.8412148578. The cubic root of 1166211655 is about 1052.5897238465.

The spelling of 1166211655 in words is "one billion, one hundred sixty-six million, two hundred eleven thousand, six hundred fifty-five".