65661103 has 2 divisors, whose sum is σ = 65661104. Its totient is φ = 65661102.

The previous prime is 65661083. The next prime is 65661107. The reversal of 65661103 is 30116656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65661103 - 2⁹ = 65660591 is a prime.

It is a super-2 number, since 2×65661103² = 8622760894353218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65661107) 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, 32830551 + 32830552.

It is an arithmetic number, because the mean of its divisors is an integer number (32830552).

Almost surely, 2^65661103 is an apocalyptic number.

65661103 is a deficient number, since it is larger than the sum of its proper divisors (1).

65661103 is an equidigital number, since it uses as much as digits as its factorization.

65661103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 65661103 is about 8103.1538921583. The cubic root of 65661103 is about 403.4311157104.

Adding to 65661103 its reverse (30116656), we get a palindrome (95777759).

The spelling of 65661103 in words is "sixty-five million, six hundred sixty-one thousand, one hundred three".