66695343057 has 20 divisors (see below), whose sum is σ = 113864360896. Its totient is φ = 38111624280.

The previous prime is 66695343023. The next prime is 66695343083. The reversal of 66695343057 is 75034359666.

It is not a de Polignac number, because 66695343057 - 2⁶ = 66695342993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66695342994 and 66695343012.

It is not an unprimeable number, because it can be changed into a prime (66695343017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 58813669 + ... + 58814802.

Almost surely, 2^66695343057 is an apocalyptic number.

It is an amenable number.

66695343057 is a deficient number, since it is larger than the sum of its proper divisors (47169017839).

66695343057 is a wasteful number, since it uses less digits than its factorization.

66695343057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117628490 (or 117628481 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 54.

The spelling of 66695343057 in words is "sixty-six billion, six hundred ninety-five million, three hundred forty-three thousand, fifty-seven".