65066563646 has 24 divisors (see below), whose sum is σ = 113613658560. Its totient is φ = 27866231232.

The previous prime is 65066563613. The next prime is 65066563649. The reversal of 65066563646 is 64636566056.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65066563649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89675 + ... + 371718.

It is an arithmetic number, because the mean of its divisors is an integer number (4733902440).

Almost surely, 2^65066563646 is an apocalyptic number.

65066563646 is a deficient number, since it is larger than the sum of its proper divisors (48547094914).

65066563646 is a wasteful number, since it uses less digits than its factorization.

65066563646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462848 (or 462841 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 53.

The spelling of 65066563646 in words is "sixty-five billion, sixty-six million, five hundred sixty-three thousand, six hundred forty-six".