220666423 has 8 divisors (see below), whose sum is σ = 228808800. Its totient is φ = 212559648.

The previous prime is 220666403. The next prime is 220666429. The reversal of 220666423 is 324666022.

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 220666423 - 2¹³ = 220658231 is a prime.

It is a super-2 number, since 2×220666423² = 97387340479229858, 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 (220666429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4065 + ... + 21397.

It is an arithmetic number, because the mean of its divisors is an integer number (28601100).

Almost surely, 2^220666423 is an apocalyptic number.

220666423 is a deficient number, since it is larger than the sum of its proper divisors (8142377).

220666423 is a wasteful number, since it uses less digits than its factorization.

220666423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17801.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 220666423 is about 14854.8451018514. The cubic root of 220666423 is about 604.2900152135.

The spelling of 220666423 in words is "two hundred twenty million, six hundred sixty-six thousand, four hundred twenty-three".