1223655166 has 8 divisors (see below), whose sum is σ = 1835636544. Its totient is φ = 611776320.

The previous prime is 1223655161. The next prime is 1223655197. The reversal of 1223655166 is 6615563221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223655161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21646 + ... + 53998.

It is an arithmetic number, because the mean of its divisors is an integer number (229454568).

Almost surely, 2^1223655166 is an apocalyptic number.

1223655166 is a deficient number, since it is larger than the sum of its proper divisors (611981378).

1223655166 is a wasteful number, since it uses less digits than its factorization.

1223655166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51266.

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

The square root of 1223655166 is about 34980.7828099944. The cubic root of 1223655166 is about 1069.5957846636.

The spelling of 1223655166 in words is "one billion, two hundred twenty-three million, six hundred fifty-five thousand, one hundred sixty-six".