1665500027 has 2 divisors, whose sum is σ = 1665500028. Its totient is φ = 1665500026.

The previous prime is 1665500021. The next prime is 1665500051. The reversal of 1665500027 is 7200055661.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7200055661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1665500027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1665499966 and 1665500002.

It is not a weakly prime, because it can be changed into another prime (1665500021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832750013 + 832750014.

It is an arithmetic number, because the mean of its divisors is an integer number (832750014).

Almost surely, 2^1665500027 is an apocalyptic number.

1665500027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1665500027 is an equidigital number, since it uses as much as digits as its factorization.

1665500027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1665500027 is about 40810.5381856206. The cubic root of 1665500027 is about 1185.3543960689.

Adding to 1665500027 its reverse (7200055661), we get a palindrome (8865555688).

The spelling of 1665500027 in words is "one billion, six hundred sixty-five million, five hundred thousand, twenty-seven".