66077725652 has 24 divisors (see below), whose sum is σ = 117425660352. Its totient is φ = 32529124800.

The previous prime is 66077725613. The next prime is 66077725657. The reversal of 66077725652 is 25652777066.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 66077725594 and 66077725603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66077725657) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31424 + ... + 364887.

It is an arithmetic number, because the mean of its divisors is an integer number (4892735848).

Almost surely, 2^66077725652 is an apocalyptic number.

It is an amenable number.

66077725652 is a deficient number, since it is larger than the sum of its proper divisors (51347934700).

66077725652 is a wasteful number, since it uses less digits than its factorization.

66077725652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396959 (or 396957 counting only the distinct ones).

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 66077725652 in words is "sixty-six billion, seventy-seven million, seven hundred twenty-five thousand, six hundred fifty-two".