220421666510 has 16 divisors (see below), whose sum is σ = 396839550672. Its totient is φ = 88150766400.

The previous prime is 220421666497. The next prime is 220421666551. The reversal of 220421666510 is 15666124022.

220421666510 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×220421666510² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2185751 + ... + 2284370.

It is an arithmetic number, because the mean of its divisors is an integer number (24802471917).

Almost surely, 2^220421666510 is an apocalyptic number.

220421666510 is a deficient number, since it is larger than the sum of its proper divisors (176417884162).

220421666510 is a wasteful number, since it uses less digits than its factorization.

220421666510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475059.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 220421666510 in words is "two hundred twenty billion, four hundred twenty-one million, six hundred sixty-six thousand, five hundred ten".