66505876850 has 24 divisors (see below), whose sum is σ = 141372493248. Its totient is φ = 22802014800.

The previous prime is 66505876823. The next prime is 66505876999. The reversal of 66505876850 is 5867850566.

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, 95008046 + ... + 95008745.

It is an arithmetic number, because the mean of its divisors is an integer number (5890520552).

Almost surely, 2^66505876850 is an apocalyptic number.

66505876850 is an abundant number, since it is smaller than the sum of its proper divisors (74866616398).

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

66505876850 is a wasteful number, since it uses less digits than its factorization.

66505876850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190016810 (or 190016805 counting only the distinct ones).

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 66505876850 in words is "sixty-six billion, five hundred five million, eight hundred seventy-six thousand, eight hundred fifty".