66765677075 has 24 divisors (see below), whose sum is σ = 86766396000. Its totient is φ = 50867055360.

The previous prime is 66765677047. The next prime is 66765677131. The reversal of 66765677075 is 57077656766.

66765677075 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 66765677075 - 2²⁰ = 66764628499 is a prime.

It is a super-3 number, since 3×66765677075³ (a number of 33 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66765676999 and 66765677017.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121850 + ... + 385199.

It is an arithmetic number, because the mean of its divisors is an integer number (3615266500).

Almost surely, 2^66765677075 is an apocalyptic number.

66765677075 is a deficient number, since it is larger than the sum of its proper divisors (20000718925).

66765677075 is a wasteful number, since it uses less digits than its factorization.

66765677075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507311 (or 507306 counting only the distinct ones).

The product of its (nonzero) digits is 77792400, while the sum is 62.

The spelling of 66765677075 in words is "sixty-six billion, seven hundred sixty-five million, six hundred seventy-seven thousand, seventy-five".