12433437627661 has 2 divisors, whose sum is σ = 12433437627662. Its totient is φ = 12433437627660.

The previous prime is 12433437627647. The next prime is 12433437627673. The reversal of 12433437627661 is 16672673433421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7331287293225 + 5102150334436 = 2707635^2 + 2258794^2 .

It is an emirp because it is prime and its reverse (16672673433421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12433437627661 - 2⁴¹ = 10234414372109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12433437627641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216718813830 + 6216718813831.

It is an arithmetic number, because the mean of its divisors is an integer number (6216718813831).

Almost surely, 2^{12433437627661} is an apocalyptic number.

It is an amenable number.

12433437627661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12433437627661 is an equidigital number, since it uses as much as digits as its factorization.

12433437627661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18289152, while the sum is 55.

The spelling of 12433437627661 in words is "twelve trillion, four hundred thirty-three billion, four hundred thirty-seven million, six hundred twenty-seven thousand, six hundred sixty-one".