1355220566 has 8 divisors (see below), whose sum is σ = 2323235280. Its totient is φ = 580808808.

The previous prime is 1355220563. The next prime is 1355220593. The reversal of 1355220566 is 6650225531.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355220563) 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 3 ways as a sum of consecutive naturals, for example, 48400721 + ... + 48400748.

It is an arithmetic number, because the mean of its divisors is an integer number (290404410).

Almost surely, 2^1355220566 is an apocalyptic number.

1355220566 is a deficient number, since it is larger than the sum of its proper divisors (968014714).

1355220566 is an equidigital number, since it uses as much as digits as its factorization.

1355220566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96801478.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 1355220566 is about 36813.3204967984. The cubic root of 1355220566 is about 1106.6322637529.

The spelling of 1355220566 in words is "one billion, three hundred fifty-five million, two hundred twenty thousand, five hundred sixty-six".