66700206 has 32 divisors (see below), whose sum is σ = 150660000. Its totient is φ = 21867840.

The previous prime is 66700201. The next prime is 66700217. The reversal of 66700206 is 60200766.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 66700206.

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, 6831 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (4708125).

Almost surely, 2^66700206 is an apocalyptic number.

66700206 is an abundant number, since it is smaller than the sum of its proper divisors (83959794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66700206 is a wasteful number, since it uses less digits than its factorization.

66700206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20321 (or 20315 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 66700206 is about 8167.0194073481. The cubic root of 66700206 is about 405.5481193051.

The spelling of 66700206 in words is "sixty-six million, seven hundred thousand, two hundred six".