1166223655 has 8 divisors (see below), whose sum is σ = 1399671072. Its totient is φ = 932843808.

The previous prime is 1166223631. The next prime is 1166223659. The reversal of 1166223655 is 5563226611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1166223655 - 2²³ = 1157835047 is a prime.

It is a super-2 number, since 2×1166223655² = 2720155226963118050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166223659) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36334 + ... + 60436.

It is an arithmetic number, because the mean of its divisors is an integer number (174958884).

Almost surely, 2^1166223655 is an apocalyptic number.

1166223655 is a deficient number, since it is larger than the sum of its proper divisors (233447417).

1166223655 is an equidigital number, since it uses as much as digits as its factorization.

1166223655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33785.

The product of its digits is 64800, while the sum is 37.

The square root of 1166223655 is about 34150.0169106840. The cubic root of 1166223655 is about 1052.5933341212.

The spelling of 1166223655 in words is "one billion, one hundred sixty-six million, two hundred twenty-three thousand, six hundred fifty-five".