2660827520381 has 2 divisors, whose sum is σ = 2660827520382. Its totient is φ = 2660827520380.

The previous prime is 2660827520321. The next prime is 2660827520437. The reversal of 2660827520381 is 1830257280662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1973477088025 + 687350432356 = 1404805^2 + 829066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2660827520381 is a prime.

It is a super-2 number, since 2×2660827520381² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2660827520321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330413760190 + 1330413760191.

It is an arithmetic number, because the mean of its divisors is an integer number (1330413760191).

Almost surely, 2^{2660827520381} is an apocalyptic number.

It is an amenable number.

2660827520381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2660827520381 is an equidigital number, since it uses as much as digits as its factorization.

2660827520381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 2660827520381 in words is "two trillion, six hundred sixty billion, eight hundred twenty-seven million, five hundred twenty thousand, three hundred eighty-one".