66077725653 has 24 divisors (see below), whose sum is σ = 96674497920. Its totient is φ = 43484875200.

The previous prime is 66077725613. The next prime is 66077725657. The reversal of 66077725653 is 35652777066.

66077725653 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 7 + 72 + 565 + 3 = 666.

66077725653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66077725653 - 2²⁹ = 65540854741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66077725653.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5291425 + ... + 5303897.

It is an arithmetic number, because the mean of its divisors is an integer number (4028104080).

Almost surely, 2^66077725653 is an apocalyptic number.

It is an amenable number.

66077725653 is a deficient number, since it is larger than the sum of its proper divisors (30596772267).

66077725653 is a wasteful number, since it uses less digits than its factorization.

66077725653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20009 (or 20006 counting only the distinct ones).

The product of its (nonzero) digits is 11113200, while the sum is 54.

The spelling of 66077725653 in words is "sixty-six billion, seventy-seven million, seven hundred twenty-five thousand, six hundred fifty-three".