50015660666557 has 2 divisors, whose sum is σ = 50015660666558. Its totient is φ = 50015660666556.

The previous prime is 50015660666549. The next prime is 50015660666581. The reversal of 50015660666557 is 75566606651005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41898512084836 + 8117148581721 = 6472906^2 + 2849061^2 .

It is a cyclic number.

It is not a de Polignac number, because 50015660666557 - 2³ = 50015660666549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50015660666537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25007830333278 + 25007830333279.

It is an arithmetic number, because the mean of its divisors is an integer number (25007830333279).

Almost surely, 2^{50015660666557} is an apocalyptic number.

It is an amenable number.

50015660666557 is a deficient number, since it is larger than the sum of its proper divisors (1).

50015660666557 is an equidigital number, since it uses as much as digits as its factorization.

50015660666557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020000, while the sum is 58.

The spelling of 50015660666557 in words is "fifty trillion, fifteen billion, six hundred sixty million, six hundred sixty-six thousand, five hundred fifty-seven".