66531334356 has 36 divisors (see below), whose sum is σ = 173601477504. Its totient is φ = 21461720400.

The previous prime is 66531334343. The next prime is 66531334361. The reversal of 66531334356 is 65343313566.

66531334356 is a `hidden beast` number, since 66 + 531 + 3 + 3 + 4 + 3 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29806830 + ... + 29809061.

It is an arithmetic number, because the mean of its divisors is an integer number (4822263264).

Almost surely, 2^66531334356 is an apocalyptic number.

It is an amenable number.

66531334356 is an abundant number, since it is smaller than the sum of its proper divisors (107070143148).

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

66531334356 is a wasteful number, since it uses less digits than its factorization.

66531334356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59615932 (or 59615927 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 45.

The spelling of 66531334356 in words is "sixty-six billion, five hundred thirty-one million, three hundred thirty-four thousand, three hundred fifty-six".