66672168 has 32 divisors (see below), whose sum is σ = 167386560. Its totient is φ = 22129920.

The previous prime is 66672167. The next prime is 66672173. The reversal of 66672168 is 86127666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (66672163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (5230830).

Almost surely, 2^66672168 is an apocalyptic number.

It is an amenable number.

66672168 is an abundant number, since it is smaller than the sum of its proper divisors (100714392).

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

66672168 is a wasteful number, since it uses less digits than its factorization.

66672168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11777 (or 11773 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 66672168 is about 8165.3026888169. The cubic root of 66672168 is about 405.4912861383.

The spelling of 66672168 in words is "sixty-six million, six hundred seventy-two thousand, one hundred sixty-eight".