6766710005381 has 2 divisors, whose sum is σ = 6766710005382. Its totient is φ = 6766710005380.

The previous prime is 6766710005371. The next prime is 6766710005479. The reversal of 6766710005381 is 1835000176676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5145139524100 + 1621570481281 = 2268290^2 + 1273409^2 .

It is a cyclic number.

It is not a de Polignac number, because 6766710005381 - 2⁶ = 6766710005317 is a prime.

It is a super-2 number, since 2×6766710005381² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6766710005371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383355002690 + 3383355002691.

It is an arithmetic number, because the mean of its divisors is an integer number (3383355002691).

Almost surely, 2^{6766710005381} is an apocalyptic number.

It is an amenable number.

6766710005381 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766710005381 is an equidigital number, since it uses as much as digits as its factorization.

6766710005381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 6766710005381 in words is "six trillion, seven hundred sixty-six billion, seven hundred ten million, five thousand, three hundred eighty-one".