66660284 has 12 divisors (see below), whose sum is σ = 122795400. Its totient is φ = 31575888.

The previous prime is 66660263. The next prime is 66660289. The reversal of 66660284 is 48206666.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66660289) 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 3 ways as a sum of consecutive naturals, for example, 438479 + ... + 438630.

It is an arithmetic number, because the mean of its divisors is an integer number (10232950).

Almost surely, 2^66660284 is an apocalyptic number.

It is an amenable number.

66660284 is a deficient number, since it is larger than the sum of its proper divisors (56135116).

66660284 is a wasteful number, since it uses less digits than its factorization.

66660284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877132 (or 877130 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 66660284 is about 8164.5749430084. The cubic root of 66660284 is about 405.4671924026.

The spelling of 66660284 in words is "sixty-six million, six hundred sixty thousand, two hundred eighty-four".