66620206 has 8 divisors (see below), whose sum is σ = 100920024. Its totient is φ = 32980200.

The previous prime is 66620189. The next prime is 66620237. The reversal of 66620206 is 60202666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164700 + ... + 165103.

It is an arithmetic number, because the mean of its divisors is an integer number (12615003).

Almost surely, 2^66620206 is an apocalyptic number.

66620206 is a deficient number, since it is larger than the sum of its proper divisors (34299818).

66620206 is a wasteful number, since it uses less digits than its factorization.

66620206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329906.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 66620206 is about 8162.1201902447. The cubic root of 66620206 is about 405.3859167616.

The spelling of 66620206 in words is "sixty-six million, six hundred twenty thousand, two hundred six".