66505107 has 8 divisors (see below), whose sum is σ = 89269200. Its totient is φ = 44038880.

The previous prime is 66505099. The next prime is 66505147. The reversal of 66505107 is 70150566.

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 66505107 - 2³ = 66505099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66505147) 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, 73944 + ... + 74837.

It is an arithmetic number, because the mean of its divisors is an integer number (11158650).

Almost surely, 2^66505107 is an apocalyptic number.

66505107 is a deficient number, since it is larger than the sum of its proper divisors (22764093).

66505107 is a wasteful number, since it uses less digits than its factorization.

66505107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148933.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 66505107 is about 8155.0663393991. The cubic root of 66505107 is about 405.1523219145.

The spelling of 66505107 in words is "sixty-six million, five hundred five thousand, one hundred seven".