66510072160 has 48 divisors (see below), whose sum is σ = 179577197856. Its totient is φ = 22803452928.

The previous prime is 66510072137. The next prime is 66510072263. The reversal of 66510072160 is 6127001566.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 29690877 + ... + 29693116.

It is an arithmetic number, because the mean of its divisors is an integer number (3741191622).

Almost surely, 2^66510072160 is an apocalyptic number.

It is an amenable number.

66510072160 is an abundant number, since it is smaller than the sum of its proper divisors (113067125696).

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

66510072160 is a wasteful number, since it uses less digits than its factorization.

66510072160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59384015 (or 59384007 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The spelling of 66510072160 in words is "sixty-six billion, five hundred ten million, seventy-two thousand, one hundred sixty".