220126421155666 has 16 divisors (see below), whose sum is σ = 335793597472800. Its totient is φ = 108195305679328.

The previous prime is 220126421155603. The next prime is 220126421155673. The reversal of 220126421155666 is 666551124621022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15631276 + ... + 26164663.

It is an arithmetic number, because the mean of its divisors is an integer number (20987099842050).

Almost surely, 2^{220126421155666} is an apocalyptic number.

220126421155666 is a deficient number, since it is larger than the sum of its proper divisors (115667176317134).

220126421155666 is a wasteful number, since it uses less digits than its factorization.

220126421155666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41840633.

The product of its (nonzero) digits is 2073600, while the sum is 49.

Adding to 220126421155666 its reverse (666551124621022), we get a palindrome (886677545776688).

The spelling of 220126421155666 in words is "two hundred twenty trillion, one hundred twenty-six billion, four hundred twenty-one million, one hundred fifty-five thousand, six hundred sixty-six".