66625020410 has 24 divisors (see below), whose sum is σ = 129859658460. Its totient is φ = 24600006912.

The previous prime is 66625020409. The next prime is 66625020419. The reversal of 66625020410 is 1402052666.

66625020410 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 13880845489 + 52744174921 = 117817^2 + 229661^2 .

It is not an unprimeable number, because it can be changed into a prime (66625020419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19709855 + ... + 19713234.

Almost surely, 2^66625020410 is an apocalyptic number.

66625020410 is a deficient number, since it is larger than the sum of its proper divisors (63234638050).

66625020410 is a wasteful number, since it uses less digits than its factorization.

66625020410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39423122 (or 39423109 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The spelling of 66625020410 in words is "sixty-six billion, six hundred twenty-five million, twenty thousand, four hundred ten".