66823444 has 12 divisors (see below), whose sum is σ = 117432000. Its totient is φ = 33271448.

The previous prime is 66823433. The next prime is 66823469. The reversal of 66823444 is 44432866.

It is a super-2 number, since 2×66823444² = 8930745336042272, which contains 22 as substring.

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, 33994 + ... + 35905.

It is an arithmetic number, because the mean of its divisors is an integer number (9786000).

Almost surely, 2^66823444 is an apocalyptic number.

It is an amenable number.

66823444 is a deficient number, since it is larger than the sum of its proper divisors (50608556).

66823444 is a wasteful number, since it uses less digits than its factorization.

66823444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70142 (or 70140 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 66823444 is about 8174.5607833082. The cubic root of 66823444 is about 405.7977346744.

The spelling of 66823444 in words is "sixty-six million, eight hundred twenty-three thousand, four hundred forty-four".