66513244534534 has 48 divisors (see below), whose sum is σ = 118760840497728. Its totient is φ = 27842056412688.

The previous prime is 66513244534463. The next prime is 66513244534537. The reversal of 66513244534534 is 43543544231566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66513244534537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189804709 + ... + 190154815.

It is an arithmetic number, because the mean of its divisors is an integer number (2474184177036).

Almost surely, 2^{66513244534534} is an apocalyptic number.

66513244534534 is a deficient number, since it is larger than the sum of its proper divisors (52247595963194).

66513244534534 is a wasteful number, since it uses less digits than its factorization.

66513244534534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395249 (or 395242 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 55.

The spelling of 66513244534534 in words is "sixty-six trillion, five hundred thirteen billion, two hundred forty-four million, five hundred thirty-four thousand, five hundred thirty-four".