66443612 has 6 divisors (see below), whose sum is σ = 116276328. Its totient is φ = 33221804.

The previous prime is 66443603. The next prime is 66443623. The reversal of 66443612 is 21634466.

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 as a sum of consecutive naturals, namely, 8305448 + ... + 8305455.

It is an arithmetic number, because the mean of its divisors is an integer number (19379388).

Almost surely, 2^66443612 is an apocalyptic number.

It is an amenable number.

66443612 is a deficient number, since it is larger than the sum of its proper divisors (49832716).

66443612 is a wasteful number, since it uses less digits than its factorization.

66443612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16610907 (or 16610905 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 66443612 is about 8151.2951118212. The cubic root of 66443612 is about 405.0274065689.

The spelling of 66443612 in words is "sixty-six million, four hundred forty-three thousand, six hundred twelve".