660525053 has 2 divisors, whose sum is σ = 660525054. Its totient is φ = 660525052.

The previous prime is 660525049. The next prime is 660525079. The reversal of 660525053 is 350525066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 585494809 + 75030244 = 24197^2 + 8662^2 .

It is a cyclic number.

It is not a de Polignac number, because 660525053 - 2² = 660525049 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660525353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330262526 + 330262527.

It is an arithmetic number, because the mean of its divisors is an integer number (330262527).

Almost surely, 2^660525053 is an apocalyptic number.

It is an amenable number.

660525053 is a deficient number, since it is larger than the sum of its proper divisors (1).

660525053 is an equidigital number, since it uses as much as digits as its factorization.

660525053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 660525053 is about 25700.6819559326. The cubic root of 660525053 is about 870.8895877174.

The spelling of 660525053 in words is "six hundred sixty million, five hundred twenty-five thousand, fifty-three".