12006617977 has 2 divisors, whose sum is σ = 12006617978. Its totient is φ = 12006617976.

The previous prime is 12006617971. The next prime is 12006617989. The reversal of 12006617977 is 77971660021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11398551696 + 608066281 = 106764^2 + 24659^2 .

It is a cyclic number.

It is not a de Polignac number, because 12006617977 - 2³ = 12006617969 is a prime.

It is not a weakly prime, because it can be changed into another prime (12006617971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6003308988 + 6003308989.

It is an arithmetic number, because the mean of its divisors is an integer number (6003308989).

Almost surely, 2^12006617977 is an apocalyptic number.

It is an amenable number.

12006617977 is a deficient number, since it is larger than the sum of its proper divisors (1).

12006617977 is an equidigital number, since it uses as much as digits as its factorization.

12006617977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 222264, while the sum is 46.

The spelling of 12006617977 in words is "twelve billion, six million, six hundred seventeen thousand, nine hundred seventy-seven".