66935138 has 16 divisors (see below), whose sum is σ = 109098240. Its totient is φ = 30682800.

The previous prime is 66935093. The next prime is 66935147. The reversal of 66935138 is 83153966.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66935095 and 66935104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27233 + ... + 29588.

It is an arithmetic number, because the mean of its divisors is an integer number (6818640).

Almost surely, 2^66935138 is an apocalyptic number.

66935138 is a deficient number, since it is larger than the sum of its proper divisors (42163102).

66935138 is a wasteful number, since it uses less digits than its factorization.

66935138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56873.

The product of its digits is 116640, while the sum is 41.

The square root of 66935138 is about 8181.3897352467. The cubic root of 66935138 is about 406.0237029849.

The spelling of 66935138 in words is "sixty-six million, nine hundred thirty-five thousand, one hundred thirty-eight".