66219196 has 12 divisors (see below), whose sum is σ = 119015848. Its totient is φ = 32214672.

The previous prime is 66219191. The next prime is 66219217. The reversal of 66219196 is 69191266.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66219191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223566 + ... + 223861.

Almost surely, 2^66219196 is an apocalyptic number.

It is an amenable number.

66219196 is a deficient number, since it is larger than the sum of its proper divisors (52796652).

66219196 is a wasteful number, since it uses less digits than its factorization.

66219196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447468 (or 447466 counting only the distinct ones).

The product of its digits is 34992, while the sum is 40.

The square root of 66219196 is about 8137.5178033599. The cubic root of 66219196 is about 404.5708933761.

The spelling of 66219196 in words is "sixty-six million, two hundred nineteen thousand, one hundred ninety-six".