66510762864 has 160 divisors (see below), whose sum is σ = 211673118720. Its totient is φ = 17524463616.

The previous prime is 66510762833. The next prime is 66510762887. The reversal of 66510762864 is 46826701566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4924729 + ... + 4938215.

It is an arithmetic number, because the mean of its divisors is an integer number (1322956992).

Almost surely, 2^66510762864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66510762864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105836559360).

66510762864 is an abundant number, since it is smaller than the sum of its proper divisors (145162355856).

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

66510762864 is a wasteful number, since it uses less digits than its factorization.

66510762864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14647 (or 14641 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 66510762864 in words is "sixty-six billion, five hundred ten million, seven hundred sixty-two thousand, eight hundred sixty-four".