66576644 has 12 divisors (see below), whose sum is σ = 117096000. Its totient is φ = 33120648.

The previous prime is 66576637. The next prime is 66576649. The reversal of 66576644 is 44667566.

It is a junction number, because it is equal to n+sod(n) for n = 66576595 and 66576604.

It is not an unprimeable number, because it can be changed into a prime (66576649) 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, 41024 + ... + 42615.

It is an arithmetic number, because the mean of its divisors is an integer number (9758000).

Almost surely, 2^66576644 is an apocalyptic number.

It is an amenable number.

66576644 is a deficient number, since it is larger than the sum of its proper divisors (50519356).

66576644 is a wasteful number, since it uses less digits than its factorization.

66576644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83842 (or 83840 counting only the distinct ones).

The product of its digits is 725760, while the sum is 44.

The square root of 66576644 is about 8159.4512070359. The cubic root of 66576644 is about 405.2975388112.

The spelling of 66576644 in words is "sixty-six million, five hundred seventy-six thousand, six hundred forty-four".