66604135 has 16 divisors (see below), whose sum is σ = 86585184. Its totient is φ = 48892032.

The previous prime is 66604127. The next prime is 66604163. The reversal of 66604135 is 53140666.

It is a cyclic number.

It is not a de Polignac number, because 66604135 - 2³ = 66604127 is a prime.

It is a super-2 number, since 2×66604135² = 8872221598196450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66604097 and 66604106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8284 + ... + 14206.

It is an arithmetic number, because the mean of its divisors is an integer number (5411574).

Almost surely, 2^66604135 is an apocalyptic number.

66604135 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66604135 is a deficient number, since it is larger than the sum of its proper divisors (19981049).

66604135 is a wasteful number, since it uses less digits than its factorization.

66604135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6114.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 66604135 is about 8161.1356440143. The cubic root of 66604135 is about 405.3533166372.

The spelling of 66604135 in words is "sixty-six million, six hundred four thousand, one hundred thirty-five".