66084644 has 12 divisors (see below), whose sum is σ = 122451084. Its totient is φ = 31098624.

The previous prime is 66084619. The next prime is 66084647. The reversal of 66084644 is 44648066.

It can be written as a sum of positive squares in 2 ways, for example, as 26646244 + 39438400 = 5162^2 + 6280^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66084598 and 66084607.

It is not an unprimeable number, because it can be changed into a prime (66084647) 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, 485849 + ... + 485984.

It is an arithmetic number, because the mean of its divisors is an integer number (10204257).

Almost surely, 2^66084644 is an apocalyptic number.

It is an amenable number.

66084644 is a deficient number, since it is larger than the sum of its proper divisors (56366440).

66084644 is a wasteful number, since it uses less digits than its factorization.

66084644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971854 (or 971852 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 66084644 is about 8129.2462135182. The cubic root of 66084644 is about 404.2966892302.

The spelling of 66084644 in words is "sixty-six million, eighty-four thousand, six hundred forty-four".