66640788053 has 8 divisors (see below), whose sum is σ = 76253447808. Its totient is φ = 57051265104.

The previous prime is 66640788047. The next prime is 66640788059. The reversal of 66640788053 is 35088704666.

66640788053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66640788047) and next prime (66640788059).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66640788053 - 2⁴ = 66640788037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66640787986 and 66640788004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66640788059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5778026 + ... + 5789547.

It is an arithmetic number, because the mean of its divisors is an integer number (9531680976).

Almost surely, 2^66640788053 is an apocalyptic number.

It is an amenable number.

66640788053 is a deficient number, since it is larger than the sum of its proper divisors (9612659755).

66640788053 is a wasteful number, since it uses less digits than its factorization.

66640788053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11568403.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 66640788053 in words is "sixty-six billion, six hundred forty million, seven hundred eighty-eight thousand, fifty-three".