66700205 has 16 divisors (see below), whose sum is σ = 94034304. Its totient is φ = 44777280.

The previous prime is 66700201. The next prime is 66700217. The reversal of 66700205 is 50200766.

It is not a de Polignac number, because 66700205 - 2² = 66700201 is a prime.

It is a super-3 number, since 3×66700205³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700201) 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, 45929 + ... + 47358.

It is an arithmetic number, because the mean of its divisors is an integer number (5877144).

Almost surely, 2^66700205 is an apocalyptic number.

66700205 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66700205 is a deficient number, since it is larger than the sum of its proper divisors (27334099).

66700205 is a wasteful number, since it uses less digits than its factorization.

66700205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93316.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 66700205 is about 8167.0193461262. The cubic root of 66700205 is about 405.5481172784.

The spelling of 66700205 in words is "sixty-six million, seven hundred thousand, two hundred five".