660812953 has 2 divisors, whose sum is σ = 660812954. Its totient is φ = 660812952.

The previous prime is 660812927. The next prime is 660812963. The reversal of 660812953 is 359218066.

660812953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 645820569 + 14992384 = 25413^2 + 3872^2 .

It is a cyclic number.

It is not a de Polignac number, because 660812953 - 2²¹ = 658715801 is a prime.

It is not a weakly prime, because it can be changed into another prime (660812963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330406476 + 330406477.

It is an arithmetic number, because the mean of its divisors is an integer number (330406477).

Almost surely, 2^660812953 is an apocalyptic number.

It is an amenable number.

660812953 is a deficient number, since it is larger than the sum of its proper divisors (1).

660812953 is an equidigital number, since it uses as much as digits as its factorization.

660812953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 660812953 is about 25706.2823644338. The cubic root of 660812953 is about 871.0160995441.

The spelling of 660812953 in words is "six hundred sixty million, eight hundred twelve thousand, nine hundred fifty-three".