665125629419 has 2 divisors, whose sum is σ = 665125629420. Its totient is φ = 665125629418.

The previous prime is 665125629403. The next prime is 665125629433. The reversal of 665125629419 is 914926521566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665125629419 - 2⁴ = 665125629403 is a prime.

It is a super-2 number, since 2×665125629419² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (665125629319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332562814709 + 332562814710.

It is an arithmetic number, because the mean of its divisors is an integer number (332562814710).

Almost surely, 2^665125629419 is an apocalyptic number.

665125629419 is a deficient number, since it is larger than the sum of its proper divisors (1).

665125629419 is an equidigital number, since it uses as much as digits as its factorization.

665125629419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6998400, while the sum is 56.

The spelling of 665125629419 in words is "six hundred sixty-five billion, one hundred twenty-five million, six hundred twenty-nine thousand, four hundred nineteen".