65066605541 has 6 divisors (see below), whose sum is σ = 75689724870. Its totient is φ = 55771376136.

The previous prime is 65066605507. The next prime is 65066605543. The reversal of 65066605541 is 14550666056.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 49753533025 + 15313072516 = 223055^2 + 123746^2 .

It is a de Polignac number, because none of the positive numbers 2^k-65066605541 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65066605492 and 65066605501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65066605543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 663944906 + ... + 663945003.

It is an arithmetic number, because the mean of its divisors is an integer number (12614954145).

Almost surely, 2^65066605541 is an apocalyptic number.

It is an amenable number.

65066605541 is a deficient number, since it is larger than the sum of its proper divisors (10623119329).

65066605541 is a wasteful number, since it uses less digits than its factorization.

65066605541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327889923 (or 1327889916 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 65066605541 in words is "sixty-five billion, sixty-six million, six hundred five thousand, five hundred forty-one".