2028666605 has 16 divisors (see below), whose sum is σ = 2785083264. Its totient is φ = 1389629760.

The previous prime is 2028666583. The next prime is 2028666641. The reversal of 2028666605 is 5066668202.

It is not a de Polignac number, because 2028666605 - 2¹⁸ = 2028404461 is a prime.

It is a super-3 number, since 3×2028666605³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

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, 4139 + ... + 63831.

It is an arithmetic number, because the mean of its divisors is an integer number (174067704).

Almost surely, 2^2028666605 is an apocalyptic number.

It is an amenable number.

2028666605 is a deficient number, since it is larger than the sum of its proper divisors (756416659).

2028666605 is an equidigital number, since it uses as much as digits as its factorization.

2028666605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60676.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 2028666605 is about 45040.7216305423. The cubic root of 2028666605 is about 1265.9121262944.

The spelling of 2028666605 in words is "two billion, twenty-eight million, six hundred sixty-six thousand, six hundred five".