1166213455 has 16 divisors (see below), whose sum is σ = 1529263008. Its totient is φ = 846720000.

The previous prime is 1166213429. The next prime is 1166213467. The reversal of 1166213455 is 5543126611.

It is not a de Polignac number, because 1166213455 - 2⁷ = 1166213327 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1166213455.

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, 15415 + ... + 50695.

It is an arithmetic number, because the mean of its divisors is an integer number (95578938).

Almost surely, 2^1166213455 is an apocalyptic number.

1166213455 is a deficient number, since it is larger than the sum of its proper divisors (363049553).

1166213455 is a wasteful number, since it uses less digits than its factorization.

1166213455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35898.

The product of its digits is 21600, while the sum is 34.

The square root of 1166213455 is about 34149.8675692893. The cubic root of 1166213455 is about 1052.5902653893.

The spelling of 1166213455 in words is "one billion, one hundred sixty-six million, two hundred thirteen thousand, four hundred fifty-five".