66661435544300 has 72 divisors (see below), whose sum is σ = 144869288157552. Its totient is φ = 26625148416000.

The previous prime is 66661435544257. The next prime is 66661435544357. The reversal of 66661435544300 is 344553416666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336709340 + ... + 336907260.

Almost surely, 2^{66661435544300} is an apocalyptic number.

It is an amenable number.

66661435544300 is an abundant number, since it is smaller than the sum of its proper divisors (78207852613252).

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

66661435544300 is a wasteful number, since it uses less digits than its factorization.

66661435544300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202899 (or 202892 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 66661435544300 in words is "sixty-six trillion, six hundred sixty-one billion, four hundred thirty-five million, five hundred forty-four thousand, three hundred".