66553206 has 8 divisors (see below), whose sum is σ = 133106424. Its totient is φ = 22184400.

The previous prime is 66553189. The next prime is 66553217. The reversal of 66553206 is 60235566.

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

66553206 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5546095 + ... + 5546106.

It is an arithmetic number, because the mean of its divisors is an integer number (16638303).

Almost surely, 2^66553206 is an apocalyptic number.

66553206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66553206 is a wasteful number, since it uses less digits than its factorization.

66553206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092206.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 66553206 is about 8158.0148320532. The cubic root of 66553206 is about 405.2499721867.

The spelling of 66553206 in words is "sixty-six million, five hundred fifty-three thousand, two hundred six".