255661066105 has 16 divisors (see below), whose sum is σ = 311028846480. Its totient is φ = 201705735168.

The previous prime is 255661066079. The next prime is 255661066181. The reversal of 255661066105 is 501660166552.

It can be written as a sum of positive squares in 8 ways, for example, as 2310917184 + 253350148921 = 48072^2 + 503339^2 .

It is a cyclic number.

It is not a de Polignac number, because 255661066105 - 2⁷ = 255661065977 is a prime.

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, 4024731 + ... + 4087759.

It is an arithmetic number, because the mean of its divisors is an integer number (19439302905).

Almost surely, 2^255661066105 is an apocalyptic number.

It is an amenable number.

255661066105 is a deficient number, since it is larger than the sum of its proper divisors (55367780375).

255661066105 is a wasteful number, since it uses less digits than its factorization.

255661066105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74220.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 255661066105 in words is "two hundred fifty-five billion, six hundred sixty-one million, sixty-six thousand, one hundred five".