1667120544757 has 2 divisors, whose sum is σ = 1667120544758. Its totient is φ = 1667120544756.

The previous prime is 1667120544743. The next prime is 1667120544767. The reversal of 1667120544757 is 7574450217661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 934095188196 + 733025356561 = 966486^2 + 856169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1667120544757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1667120544698 and 1667120544707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1667120544767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833560272378 + 833560272379.

It is an arithmetic number, because the mean of its divisors is an integer number (833560272379).

Almost surely, 2^{1667120544757} is an apocalyptic number.

It is an amenable number.

1667120544757 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667120544757 is an equidigital number, since it uses as much as digits as its factorization.

1667120544757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9878400, while the sum is 55.

The spelling of 1667120544757 in words is "one trillion, six hundred sixty-seven billion, one hundred twenty million, five hundred forty-four thousand, seven hundred fifty-seven".