66500835 has 16 divisors (see below), whose sum is σ = 106803360. Its totient is φ = 35333120.

The previous prime is 66500831. The next prime is 66500851. The reversal of 66500835 is 53800566.

It is not a de Polignac number, because 66500835 - 2² = 66500831 is a prime.

It is a super-2 number, since 2×66500835² = 8844722111394450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66500796 and 66500805.

It is not an unprimeable number, because it can be changed into a prime (66500831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4206 + ... + 12275.

It is an arithmetic number, because the mean of its divisors is an integer number (6675210).

Almost surely, 2^66500835 is an apocalyptic number.

66500835 is a deficient number, since it is larger than the sum of its proper divisors (40302525).

66500835 is a wasteful number, since it uses less digits than its factorization.

66500835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66500835 is about 8154.8044121242. The cubic root of 66500835 is about 405.1436466520.

The spelling of 66500835 in words is "sixty-six million, five hundred thousand, eight hundred thirty-five".