66405135 has 8 divisors (see below), whose sum is σ = 106248240. Its totient is φ = 35416064.

The previous prime is 66405127. The next prime is 66405137. The reversal of 66405135 is 53150466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66405135 - 2³ = 66405127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66405137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213490 + ... + 2213519.

It is an arithmetic number, because the mean of its divisors is an integer number (13281030).

Almost surely, 2^66405135 is an apocalyptic number.

66405135 is a deficient number, since it is larger than the sum of its proper divisors (39843105).

66405135 is a wasteful number, since it uses less digits than its factorization.

66405135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427017.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 66405135 is about 8148.9345929391. The cubic root of 66405135 is about 404.9492086892.

The spelling of 66405135 in words is "sixty-six million, four hundred five thousand, one hundred thirty-five".