205668086975 has 24 divisors (see below), whose sum is σ = 276621930480. Its totient is φ = 150785291520.

The previous prime is 205668086969. The next prime is 205668086999. The reversal of 205668086975 is 579680866502.

It is not a de Polignac number, because 205668086975 - 2¹⁴ = 205668070591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2231174 + ... + 2321523.

It is an arithmetic number, because the mean of its divisors is an integer number (11525913770).

Almost surely, 2^205668086975 is an apocalyptic number.

205668086975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

205668086975 is a deficient number, since it is larger than the sum of its proper divisors (70953843505).

205668086975 is a wasteful number, since it uses less digits than its factorization.

205668086975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552859 (or 4552854 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 62.

The spelling of 205668086975 in words is "two hundred five billion, six hundred sixty-eight million, eighty-six thousand, nine hundred seventy-five".