1667736624497 has 2 divisors, whose sum is σ = 1667736624498. Its totient is φ = 1667736624496.

The previous prime is 1667736624481. The next prime is 1667736624559. The reversal of 1667736624497 is 7944266377661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1500720551521 + 167016072976 = 1225039^2 + 408676^2 .

It is an emirp because it is prime and its reverse (7944266377661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1667736624497 - 2⁴ = 1667736624481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1667736624097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833868312248 + 833868312249.

It is an arithmetic number, because the mean of its divisors is an integer number (833868312249).

Almost surely, 2^{1667736624497} is an apocalyptic number.

It is an amenable number.

1667736624497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667736624497 is an equidigital number, since it uses as much as digits as its factorization.

1667736624497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384072192, while the sum is 68.

The spelling of 1667736624497 in words is "one trillion, six hundred sixty-seven billion, seven hundred thirty-six million, six hundred twenty-four thousand, four hundred ninety-seven".