206566665602 has 16 divisors (see below), whose sum is σ = 352714623552. Its totient is φ = 89811593520.

The previous prime is 206566665583. The next prime is 206566665631.

206566665602 is nontrivially palindromic in base 10.

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, 204116753 + ... + 204117764.

It is an arithmetic number, because the mean of its divisors is an integer number (22044663972).

Almost surely, 2^206566665602 is an apocalyptic number.

206566665602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

206566665602 is a deficient number, since it is larger than the sum of its proper divisors (146147957950).

206566665602 is a wasteful number, since it uses less digits than its factorization.

206566665602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408234553.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 206566665602 in words is "two hundred six billion, five hundred sixty-six million, six hundred sixty-five thousand, six hundred two".