2665038191 has 2 divisors, whose sum is σ = 2665038192. Its totient is φ = 2665038190.

The previous prime is 2665038151. The next prime is 2665038199. The reversal of 2665038191 is 1918305662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2665038191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665038199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332519095 + 1332519096.

It is an arithmetic number, because the mean of its divisors is an integer number (1332519096).

Almost surely, 2^2665038191 is an apocalyptic number.

2665038191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665038191 is an equidigital number, since it uses as much as digits as its factorization.

2665038191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 2665038191 is about 51624.0078936148. The cubic root of 2665038191 is about 1386.4402107300.

The spelling of 2665038191 in words is "two billion, six hundred sixty-five million, thirty-eight thousand, one hundred ninety-one".