206623660 has 12 divisors (see below), whose sum is σ = 433909728. Its totient is φ = 82649456.

The previous prime is 206623619. The next prime is 206623663. The reversal of 206623660 is 66326602.

It is not an unprimeable number, because it can be changed into a prime (206623663) 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, 5165572 + ... + 5165611.

It is an arithmetic number, because the mean of its divisors is an integer number (36159144).

Almost surely, 2^206623660 is an apocalyptic number.

206623660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206623660 is an abundant number, since it is smaller than the sum of its proper divisors (227286068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206623660 is a wasteful number, since it uses less digits than its factorization.

206623660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10331192 (or 10331190 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 206623660 is about 14374.4099009316. The cubic root of 206623660 is about 591.1894609694.

The spelling of 206623660 in words is "two hundred six million, six hundred twenty-three thousand, six hundred sixty".