66210258560 has 32 divisors (see below), whose sum is σ = 158283900900. Its totient is φ = 26484103168.

The previous prime is 66210258529. The next prime is 66210258571. The reversal of 66210258560 is 6585201266.

It can be written as a sum of positive squares in 2 ways, for example, as 64446930496 + 1763328064 = 253864^2 + 41992^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51726125 + ... + 51727404.

Almost surely, 2^66210258560 is an apocalyptic number.

It is an amenable number.

66210258560 is an abundant number, since it is smaller than the sum of its proper divisors (92073642340).

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

66210258560 is a wasteful number, since it uses less digits than its factorization.

66210258560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103453548 (or 103453536 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 66210258560 in words is "sixty-six billion, two hundred ten million, two hundred fifty-eight thousand, five hundred sixty".