220606705 has 24 divisors (see below), whose sum is σ = 306803520. Its totient is φ = 150992640.

The previous prime is 220606693. The next prime is 220606769. The reversal of 220606705 is 507606022.

It is not a de Polignac number, because 220606705 - 2¹⁵ = 220573937 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8956 + ... + 22834.

It is an arithmetic number, because the mean of its divisors is an integer number (12783480).

Almost surely, 2^220606705 is an apocalyptic number.

It is an amenable number.

220606705 is a deficient number, since it is larger than the sum of its proper divisors (86196815).

220606705 is a wasteful number, since it uses less digits than its factorization.

220606705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13929 (or 13912 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 220606705 is about 14852.8349145879. The cubic root of 220606705 is about 604.2354981639.

The spelling of 220606705 in words is "two hundred twenty million, six hundred six thousand, seven hundred five".