1200666610537 has 2 divisors, whose sum is σ = 1200666610538. Its totient is φ = 1200666610536.

The previous prime is 1200666610499. The next prime is 1200666610547. The reversal of 1200666610537 is 7350166660021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 684034860096 + 516631750441 = 827064^2 + 718771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1200666610537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200666610493 and 1200666610502.

It is not a weakly prime, because it can be changed into another prime (1200666610547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600333305268 + 600333305269.

It is an arithmetic number, because the mean of its divisors is an integer number (600333305269).

Almost surely, 2^{1200666610537} is an apocalyptic number.

It is an amenable number.

1200666610537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200666610537 is an equidigital number, since it uses as much as digits as its factorization.

1200666610537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 1200666610537 in words is "one trillion, two hundred billion, six hundred sixty-six million, six hundred ten thousand, five hundred thirty-seven".