66601335500442 has 40 divisors (see below), whose sum is σ = 149242947069216. Its totient is φ = 22199460191208.

The previous prime is 66601335500437. The next prime is 66601335500591. The reversal of 66601335500442 is 24400553310666.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5453008 + ... + 12764715.

Almost surely, 2^{66601335500442} is an apocalyptic number.

66601335500442 is an abundant number, since it is smaller than the sum of its proper divisors (82641611568774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66601335500442 is a wasteful number, since it uses less digits than its factorization.

66601335500442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18240304 (or 18240295 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 45.

The spelling of 66601335500442 in words is "sixty-six trillion, six hundred one billion, three hundred thirty-five million, five hundred thousand, four hundred forty-two".