2066656417 has 8 divisors (see below), whose sum is σ = 2362171136. Its totient is φ = 1771211232.

The previous prime is 2066656399. The next prime is 2066656453. The reversal of 2066656417 is 7146566602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2066656417 - 2¹⁹ = 2066132129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2066656477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93373 + ... + 113365.

It is an arithmetic number, because the mean of its divisors is an integer number (295271392).

Almost surely, 2^2066656417 is an apocalyptic number.

It is an amenable number.

2066656417 is a deficient number, since it is larger than the sum of its proper divisors (295514719).

2066656417 is a wasteful number, since it uses less digits than its factorization.

2066656417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34767.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 2066656417 is about 45460.4929251763. The cubic root of 2066656417 is about 1273.7653390952.

The spelling of 2066656417 in words is "two billion, sixty-six million, six hundred fifty-six thousand, four hundred seventeen".