66252047328 has 72 divisors (see below), whose sum is σ = 189887862528. Its totient is φ = 21910113792.

The previous prime is 66252047299. The next prime is 66252047347. The reversal of 66252047328 is 82374025266.

66252047328 is a `hidden beast` number, since 6 + 62 + 520 + 47 + 3 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 869101 + ... + 942252.

It is an arithmetic number, because the mean of its divisors is an integer number (2637331424).

Almost surely, 2^66252047328 is an apocalyptic number.

It is an amenable number.

66252047328 is an abundant number, since it is smaller than the sum of its proper divisors (123635815200).

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

66252047328 is a wasteful number, since it uses less digits than its factorization.

66252047328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811496 (or 1811485 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 66252047328 in words is "sixty-six billion, two hundred fifty-two million, forty-seven thousand, three hundred twenty-eight".