66910135 has 4 divisors (see below), whose sum is σ = 80292168. Its totient is φ = 53528104.

The previous prime is 66910133. The next prime is 66910157. The reversal of 66910135 is 53101966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66910135 - 2¹ = 66910133 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66910097 and 66910106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66910133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6691009 + ... + 6691018.

It is an arithmetic number, because the mean of its divisors is an integer number (20073042).

Almost surely, 2^66910135 is an apocalyptic number.

66910135 is a deficient number, since it is larger than the sum of its proper divisors (13382033).

66910135 is a wasteful number, since it uses less digits than its factorization.

66910135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13382032.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 66910135 is about 8179.8615513956. The cubic root of 66910135 is about 405.9731412259.

The spelling of 66910135 in words is "sixty-six million, nine hundred ten thousand, one hundred thirty-five".