660153235011631 has 2 divisors, whose sum is σ = 660153235011632. Its totient is φ = 660153235011630.

The previous prime is 660153235011553. The next prime is 660153235011637. The reversal of 660153235011631 is 136110532351066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660153235011631 - 2⁴³ = 651357141989423 is a prime.

It is a super-2 number, since 2×660153235011631² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (660153235011637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330076617505815 + 330076617505816.

It is an arithmetic number, because the mean of its divisors is an integer number (330076617505816).

Almost surely, 2^{660153235011631} is an apocalyptic number.

660153235011631 is a deficient number, since it is larger than the sum of its proper divisors (1).

660153235011631 is an equidigital number, since it uses as much as digits as its factorization.

660153235011631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

Adding to 660153235011631 its reverse (136110532351066), we get a palindrome (796263767362697).

The spelling of 660153235011631 in words is "six hundred sixty trillion, one hundred fifty-three billion, two hundred thirty-five million, eleven thousand, six hundred thirty-one".