65066656016 has 40 divisors (see below), whose sum is σ = 126585034200. Its totient is φ = 32399682560.

The previous prime is 65066655923. The next prime is 65066656033. The reversal of 65066656016 is 61065666056.

It can be written as a sum of positive squares in 4 ways, for example, as 27127407616 + 37939248400 = 164704^2 + 194780^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12536750 + ... + 12541938.

It is an arithmetic number, because the mean of its divisors is an integer number (3164625855).

Almost surely, 2^65066656016 is an apocalyptic number.

It is an amenable number.

65066656016 is a deficient number, since it is larger than the sum of its proper divisors (61518378184).

65066656016 is a wasteful number, since it uses less digits than its factorization.

65066656016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8267 (or 8261 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 47.

The spelling of 65066656016 in words is "sixty-five billion, sixty-six million, six hundred fifty-six thousand, sixteen".