66197822 has 8 divisors (see below), whose sum is σ = 99373176. Its totient is φ = 33073432.

The previous prime is 66197819. The next prime is 66197867. The reversal of 66197822 is 22879166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66197822.

It is a congruent number.

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, 9308 + ... + 14799.

It is an arithmetic number, because the mean of its divisors is an integer number (12421647).

Almost surely, 2^66197822 is an apocalyptic number.

66197822 is a deficient number, since it is larger than the sum of its proper divisors (33175354).

66197822 is a wasteful number, since it uses less digits than its factorization.

66197822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25482.

The product of its digits is 72576, while the sum is 41.

The square root of 66197822 is about 8136.2043976292. The cubic root of 66197822 is about 404.5273600335.

It can be divided in two parts, 6619 and 7822, that added together give a palindrome (14441).

The spelling of 66197822 in words is "sixty-six million, one hundred ninety-seven thousand, eight hundred twenty-two".