66944604 has 12 divisors (see below), whose sum is σ = 156204104. Its totient is φ = 22314864.

The previous prime is 66944573. The next prime is 66944609. The reversal of 66944604 is 40644966.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66944609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789347 + ... + 2789370.

Almost surely, 2^66944604 is an apocalyptic number.

It is an amenable number.

66944604 is an abundant number, since it is smaller than the sum of its proper divisors (89259500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66944604 is a wasteful number, since it uses less digits than its factorization.

66944604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5578724 (or 5578722 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 66944604 is about 8181.9682228667. The cubic root of 66944604 is about 406.0428421064.

The spelling of 66944604 in words is "sixty-six million, nine hundred forty-four thousand, six hundred four".