66702205 has 8 divisors (see below), whose sum is σ = 80751672. Its totient is φ = 52889088.

The previous prime is 66702191. The next prime is 66702227. The reversal of 66702205 is 50220766.

It can be written as a sum of positive squares in 4 ways, for example, as 3308761 + 63393444 = 1819^2 + 7962^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66702205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58464 + ... + 59593.

It is an arithmetic number, because the mean of its divisors is an integer number (10093959).

Almost surely, 2^66702205 is an apocalyptic number.

It is an amenable number.

66702205 is a deficient number, since it is larger than the sum of its proper divisors (14049467).

66702205 is a wasteful number, since it uses less digits than its factorization.

66702205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118175.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 66702205 is about 8167.1417889002. The cubic root of 66702205 is about 405.5521706799.

The spelling of 66702205 in words is "sixty-six million, seven hundred two thousand, two hundred five".