666682773 has 16 divisors (see below), whose sum is σ = 936660480. Its totient is φ = 420628464.

The previous prime is 666682771. The next prime is 666682787. The reversal of 666682773 is 377286666.

It is a happy number.

It is not a de Polignac number, because 666682773 - 2¹ = 666682771 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666682771) 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 15 ways as a sum of consecutive naturals, for example, 55090 + ... + 66092.

It is an arithmetic number, because the mean of its divisors is an integer number (58541280).

Almost surely, 2^666682773 is an apocalyptic number.

It is an amenable number.

666682773 is a deficient number, since it is larger than the sum of its proper divisors (269977707).

666682773 is a wasteful number, since it uses less digits than its factorization.

666682773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12088.

The product of its digits is 3048192, while the sum is 51.

The square root of 666682773 is about 25820.2008706362. The cubic root of 666682773 is about 873.5874997687.

The spelling of 666682773 in words is "six hundred sixty-six million, six hundred eighty-two thousand, seven hundred seventy-three".