66447044 has 12 divisors (see below), whose sum is σ = 117589500. Its totient is φ = 32850048.

The previous prime is 66447041. The next prime is 66447103. The reversal of 66447044 is 44074466.

It can be written as a sum of positive squares in 2 ways, for example, as 47087044 + 19360000 = 6862^2 + 4400^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66446995 and 66447013.

It is not an unprimeable number, because it can be changed into a prime (66447041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92969 + ... + 93680.

It is an arithmetic number, because the mean of its divisors is an integer number (9799125).

Almost surely, 2^66447044 is an apocalyptic number.

It is an amenable number.

66447044 is a deficient number, since it is larger than the sum of its proper divisors (51142456).

66447044 is a wasteful number, since it uses less digits than its factorization.

66447044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186742 (or 186740 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 35.

The square root of 66447044 is about 8151.5056277966. The cubic root of 66447044 is about 405.0343800515.

The spelling of 66447044 in words is "sixty-six million, four hundred forty-seven thousand, forty-four".