660562673 has 2 divisors, whose sum is σ = 660562674. Its totient is φ = 660562672.

The previous prime is 660562621. The next prime is 660562697. The reversal of 660562673 is 376265066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501222544 + 159340129 = 22388^2 + 12623^2 .

It is a cyclic number.

It is not a de Polignac number, because 660562673 - 2¹⁶ = 660497137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 660562673.

It is not a weakly prime, because it can be changed into another prime (660502673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330281336 + 330281337.

It is an arithmetic number, because the mean of its divisors is an integer number (330281337).

Almost surely, 2^660562673 is an apocalyptic number.

It is an amenable number.

660562673 is a deficient number, since it is larger than the sum of its proper divisors (1).

660562673 is an equidigital number, since it uses as much as digits as its factorization.

660562673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 660562673 is about 25701.4138327058. The cubic root of 660562673 is about 870.9061211525.

The spelling of 660562673 in words is "six hundred sixty million, five hundred sixty-two thousand, six hundred seventy-three".