205666010054 has 32 divisors (see below), whose sum is σ = 312460001280. Its totient is φ = 101521994112.

The previous prime is 205666010023. The next prime is 205666010087. The reversal of 205666010054 is 450010666502.

It is a junction number, because it is equal to n+sod(n) for n = 205666009996 and 205666010023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46080227 + ... + 46084689.

It is an arithmetic number, because the mean of its divisors is an integer number (9764375040).

Almost surely, 2^205666010054 is an apocalyptic number.

205666010054 is a deficient number, since it is larger than the sum of its proper divisors (106793991226).

205666010054 is a wasteful number, since it uses less digits than its factorization.

205666010054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5444.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 205666010054 its reverse (450010666502), we get a palindrome (655676676556).

The spelling of 205666010054 in words is "two hundred five billion, six hundred sixty-six million, ten thousand, fifty-four".