66996222 has 8 divisors (see below), whose sum is σ = 133992456. Its totient is φ = 22332072.

The previous prime is 66996179. The next prime is 66996253. The reversal of 66996222 is 22269966.

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

66996222 is an admirable number.

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, 5583013 + ... + 5583024.

It is an arithmetic number, because the mean of its divisors is an integer number (16749057).

Almost surely, 2^66996222 is an apocalyptic number.

66996222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66996222 is a wasteful number, since it uses less digits than its factorization.

66996222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11166042.

The product of its digits is 139968, while the sum is 42.

The square root of 66996222 is about 8185.1219905387. The cubic root of 66996222 is about 406.1471758072.

It can be divided in two parts, 6699 and 6222, that added together give a palindrome (12921).

The spelling of 66996222 in words is "sixty-six million, nine hundred ninety-six thousand, two hundred twenty-two".