66910444 has 12 divisors (see below), whose sum is σ = 117427464. Its totient is φ = 33359744.

The previous prime is 66910423. The next prime is 66910463. The reversal of 66910444 is 44401966.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22282 + ... + 25105.

It is an arithmetic number, because the mean of its divisors is an integer number (9785622).

Almost surely, 2^66910444 is an apocalyptic number.

It is an amenable number.

66910444 is a deficient number, since it is larger than the sum of its proper divisors (50517020).

66910444 is a wasteful number, since it uses less digits than its factorization.

66910444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47744 (or 47742 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 66910444 is about 8179.8804392240. The cubic root of 66910444 is about 405.9737661712.

The spelling of 66910444 in words is "sixty-six million, nine hundred ten thousand, four hundred forty-four".