1660804393253 has 2 divisors, whose sum is σ = 1660804393254. Its totient is φ = 1660804393252.

The previous prime is 1660804393247. The next prime is 1660804393331. The reversal of 1660804393253 is 3523934080661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1470597633124 + 190206760129 = 1212682^2 + 436127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660804393253 - 2¹⁶ = 1660804327717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660804395253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830402196626 + 830402196627.

It is an arithmetic number, because the mean of its divisors is an integer number (830402196627).

Almost surely, 2^{1660804393253} is an apocalyptic number.

It is an amenable number.

1660804393253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660804393253 is an equidigital number, since it uses as much as digits as its factorization.

1660804393253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 1660804393253 in words is "one trillion, six hundred sixty billion, eight hundred four million, three hundred ninety-three thousand, two hundred fifty-three".