12006637777 has 4 divisors (see below), whose sum is σ = 12006904176. Its totient is φ = 12006371380.

The previous prime is 12006637763. The next prime is 12006637789. The reversal of 12006637777 is 77773660021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77773660021 = 4931 ⋅15772391.

It is a cyclic number.

It is not a de Polignac number, because 12006637777 - 2¹⁹ = 12006113489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12006637717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46999 + ... + 161932.

It is an arithmetic number, because the mean of its divisors is an integer number (3001726044).

Almost surely, 2^12006637777 is an apocalyptic number.

It is an amenable number.

12006637777 is a deficient number, since it is larger than the sum of its proper divisors (266399).

12006637777 is an equidigital number, since it uses as much as digits as its factorization.

12006637777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266398.

The product of its (nonzero) digits is 518616, while the sum is 46.

The spelling of 12006637777 in words is "twelve billion, six million, six hundred thirty-seven thousand, seven hundred seventy-seven".