66797444 has 24 divisors (see below), whose sum is σ = 134010240. Its totient is φ = 28538496.

The previous prime is 66797443. The next prime is 66797453. The reversal of 66797444 is 44479766.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66797441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5897 + ... + 12975.

It is an arithmetic number, because the mean of its divisors is an integer number (5583760).

Almost surely, 2^66797444 is an apocalyptic number.

It is an amenable number.

66797444 is an abundant number, since it is smaller than the sum of its proper divisors (67212796).

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

66797444 is a wasteful number, since it uses less digits than its factorization.

66797444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7427 (or 7425 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 66797444 is about 8172.9703290787. The cubic root of 66797444 is about 405.7450979093.

The spelling of 66797444 in words is "sixty-six million, seven hundred ninety-seven thousand, four hundred forty-four".