66066196 has 24 divisors (see below), whose sum is σ = 134628480. Its totient is φ = 27779232.

The previous prime is 66066181. The next prime is 66066197. The reversal of 66066196 is 69166066.

It is a happy number.

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 (66066197) 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, 20776 + ... + 23743.

It is an arithmetic number, because the mean of its divisors is an integer number (5609520).

Almost surely, 2^66066196 is an apocalyptic number.

It is an amenable number.

66066196 is an abundant number, since it is smaller than the sum of its proper divisors (68562284).

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

66066196 is a wasteful number, since it uses less digits than its factorization.

66066196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44583 (or 44581 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 66066196 is about 8128.1114657711. Note that the first 3 decimals coincide. The cubic root of 66066196 is about 404.2590649602.

The spelling of 66066196 in words is "sixty-six million, sixty-six thousand, one hundred ninety-six".