665913119 has 2 divisors, whose sum is σ = 665913120. Its totient is φ = 665913118.

The previous prime is 665913097. The next prime is 665913163. The reversal of 665913119 is 911319566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665913119 is a prime.

It is a super-2 number, since 2×665913119² = 886880564112616322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665913169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332956559 + 332956560.

It is an arithmetic number, because the mean of its divisors is an integer number (332956560).

Almost surely, 2^665913119 is an apocalyptic number.

665913119 is a deficient number, since it is larger than the sum of its proper divisors (1).

665913119 is an equidigital number, since it uses as much as digits as its factorization.

665913119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 41.

The square root of 665913119 is about 25805.2924610437. The cubic root of 665913119 is about 873.2511983858.

The spelling of 665913119 in words is "six hundred sixty-five million, nine hundred thirteen thousand, one hundred nineteen".