660325453 has 2 divisors, whose sum is σ = 660325454. Its totient is φ = 660325452.

The previous prime is 660325403. The next prime is 660325483. The reversal of 660325453 is 354523066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 659616489 + 708964 = 25683^2 + 842^2 .

It is a cyclic number.

It is not a de Polignac number, because 660325453 - 2⁹ = 660324941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660325403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330162726 + 330162727.

It is an arithmetic number, because the mean of its divisors is an integer number (330162727).

Almost surely, 2^660325453 is an apocalyptic number.

It is an amenable number.

660325453 is a deficient number, since it is larger than the sum of its proper divisors (1).

660325453 is an equidigital number, since it uses as much as digits as its factorization.

660325453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 660325453 is about 25696.7984970891. The cubic root of 660325453 is about 870.8018559585.

The spelling of 660325453 in words is "six hundred sixty million, three hundred twenty-five thousand, four hundred fifty-three".