660253511 has 2 divisors, whose sum is σ = 660253512. Its totient is φ = 660253510.

The previous prime is 660253507. The next prime is 660253589. The reversal of 660253511 is 115352066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660253511 - 2² = 660253507 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660255511) 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 as a sum of consecutive naturals, namely, 330126755 + 330126756.

It is an arithmetic number, because the mean of its divisors is an integer number (330126756).

Almost surely, 2^660253511 is an apocalyptic number.

660253511 is a deficient number, since it is larger than the sum of its proper divisors (1).

660253511 is an equidigital number, since it uses as much as digits as its factorization.

660253511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 660253511 is about 25695.3986347751. The cubic root of 660253511 is about 870.7702303906.

The spelling of 660253511 in words is "six hundred sixty million, two hundred fifty-three thousand, five hundred eleven".