66444486 has 8 divisors (see below), whose sum is σ = 132888984. Its totient is φ = 22148160.

The previous prime is 66444479. The next prime is 66444491. The reversal of 66444486 is 68444466.

It is a happy number.

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

66444486 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, 5537035 + ... + 5537046.

It is an arithmetic number, because the mean of its divisors is an integer number (16611123).

Almost surely, 2^66444486 is an apocalyptic number.

66444486 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.

66444486 is a wasteful number, since it uses less digits than its factorization.

66444486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11074086.

The product of its digits is 442368, while the sum is 42.

The square root of 66444486 is about 8151.3487227575. The cubic root of 66444486 is about 405.0291824727.

It can be divided in two parts, 664 and 44486, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 66444486 in words is "sixty-six million, four hundred forty-four thousand, four hundred eighty-six".