65945605 has 12 divisors (see below), whose sum is σ = 86983596. Its totient is φ = 47960000.

The previous prime is 65945603. The next prime is 65945609. The reversal of 65945605 is 50654956.

It can be written as a sum of positive squares in 2 ways, for example, as 25381444 + 40564161 = 5038^2 + 6369^2 .

It is not a de Polignac number, because 65945605 - 2¹ = 65945603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65945603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53896 + ... + 55105.

It is an arithmetic number, because the mean of its divisors is an integer number (7248633).

Almost surely, 2^65945605 is an apocalyptic number.

It is an amenable number.

65945605 is a deficient number, since it is larger than the sum of its proper divisors (21037991).

65945605 is a wasteful number, since it uses less digits than its factorization.

65945605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109028 (or 109017 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 65945605 is about 8120.6899337433. The cubic root of 65945605 is about 404.0129497042.

It can be divided in two parts, 659 and 45605, that added together give a palindrome (46264).

The spelling of 65945605 in words is "sixty-five million, nine hundred forty-five thousand, six hundred five".