1346666663977 has 2 divisors, whose sum is σ = 1346666663978. Its totient is φ = 1346666663976.

The previous prime is 1346666663971. The next prime is 1346666664001. The reversal of 1346666663977 is 7793666666431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768259262016 + 578407401961 = 876504^2 + 760531^2 .

It is a cyclic number.

It is not a de Polignac number, because 1346666663977 - 2¹⁵ = 1346666631209 is a prime.

It is a super-2 number, since 2×1346666663977² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1346666663971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673333331988 + 673333331989.

It is an arithmetic number, because the mean of its divisors is an integer number (673333331989).

Almost surely, 2^{1346666663977} is an apocalyptic number.

It is an amenable number.

1346666663977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1346666663977 is an equidigital number, since it uses as much as digits as its factorization.

1346666663977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 740710656, while the sum is 70.

The spelling of 1346666663977 in words is "one trillion, three hundred forty-six billion, six hundred sixty-six million, six hundred sixty-three thousand, nine hundred seventy-seven".