1966277256473 has 2 divisors, whose sum is σ = 1966277256474. Its totient is φ = 1966277256472.

The previous prime is 1966277256467. The next prime is 1966277256491. The reversal of 1966277256473 is 3746527726691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1125822858304 + 840454398169 = 1061048^2 + 916763^2 .

It is a cyclic number.

It is not a de Polignac number, because 1966277256473 - 2⁴ = 1966277256457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1966277256413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 983138628236 + 983138628237.

It is an arithmetic number, because the mean of its divisors is an integer number (983138628237).

Almost surely, 2^{1966277256473} is an apocalyptic number.

It is an amenable number.

1966277256473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1966277256473 is an equidigital number, since it uses as much as digits as its factorization.

1966277256473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 160030080, while the sum is 65.

The spelling of 1966277256473 in words is "one trillion, nine hundred sixty-six billion, two hundred seventy-seven million, two hundred fifty-six thousand, four hundred seventy-three".