2665161019 has 2 divisors, whose sum is σ = 2665161020. Its totient is φ = 2665161018.

The previous prime is 2665161017. The next prime is 2665161049. The reversal of 2665161019 is 9101615662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2665161019 - 2¹ = 2665161017 is a prime.

It is a super-2 number, since 2×2665161019² = 14206166514394236722, which contains 22 as substring.

Together with 2665161017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2665161011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332580509 + 1332580510.

It is an arithmetic number, because the mean of its divisors is an integer number (1332580510).

Almost surely, 2^2665161019 is an apocalyptic number.

2665161019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665161019 is an equidigital number, since it uses as much as digits as its factorization.

2665161019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 2665161019 is about 51625.1975202033. The cubic root of 2665161019 is about 1386.4615101199.

The spelling of 2665161019 in words is "two billion, six hundred sixty-five million, one hundred sixty-one thousand, nineteen".