65518001 has 2 divisors, whose sum is σ = 65518002. Its totient is φ = 65518000.

The previous prime is 65517929. The next prime is 65518003. The reversal of 65518001 is 10081556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47886400 + 17631601 = 6920^2 + 4199^2 .

It is a cyclic number.

It is not a de Polignac number, because 65518001 - 2¹⁸ = 65255857 is a prime.

Together with 65518003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65518003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32759000 + 32759001.

It is an arithmetic number, because the mean of its divisors is an integer number (32759001).

Almost surely, 2^65518001 is an apocalyptic number.

It is an amenable number.

65518001 is a deficient number, since it is larger than the sum of its proper divisors (1).

65518001 is an equidigital number, since it uses as much as digits as its factorization.

65518001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 65518001 is about 8094.3190572154. The cubic root of 65518001 is about 403.1378228880.

Adding to 65518001 its reverse (10081556), we get a palindrome (75599557).

The spelling of 65518001 in words is "sixty-five million, five hundred eighteen thousand, one".