66443570 has 32 divisors (see below), whose sum is σ = 126792000. Its totient is φ = 24998976.

The previous prime is 66443567. The next prime is 66443603. The reversal of 66443570 is 7534466.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66443570.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27137 + ... + 29483.

It is an arithmetic number, because the mean of its divisors is an integer number (3962250).

Almost surely, 2^66443570 is an apocalyptic number.

66443570 is a deficient number, since it is larger than the sum of its proper divisors (60348430).

66443570 is a wasteful number, since it uses less digits than its factorization.

66443570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2522.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 66443570 is about 8151.2925355431. The cubic root of 66443570 is about 405.0273212275.

The spelling of 66443570 in words is "sixty-six million, four hundred forty-three thousand, five hundred seventy".