660855274537 has 2 divisors, whose sum is σ = 660855274538. Its totient is φ = 660855274536.

The previous prime is 660855274523. The next prime is 660855274589. The reversal of 660855274537 is 735472558066.

It is a happy number.

660855274537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 507939864601 + 152915409936 = 712699^2 + 391044^2 .

It is a cyclic number.

It is not a de Polignac number, because 660855274537 - 2²³ = 660846885929 is a prime.

It is not a weakly prime, because it can be changed into another prime (660855275537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330427637268 + 330427637269.

It is an arithmetic number, because the mean of its divisors is an integer number (330427637269).

Almost surely, 2^660855274537 is an apocalyptic number.

It is an amenable number.

660855274537 is a deficient number, since it is larger than the sum of its proper divisors (1).

660855274537 is an equidigital number, since it uses as much as digits as its factorization.

660855274537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336000, while the sum is 58.

The spelling of 660855274537 in words is "six hundred sixty billion, eight hundred fifty-five million, two hundred seventy-four thousand, five hundred thirty-seven".