66616196 has 6 divisors (see below), whose sum is σ = 116578350. Its totient is φ = 33308096.

The previous prime is 66616189. The next prime is 66616201. The reversal of 66616196 is 69161666.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 46240000 + 20376196 = 6800^2 + 4514^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8327021 + ... + 8327028.

It is an arithmetic number, because the mean of its divisors is an integer number (19429725).

Almost surely, 2^66616196 is an apocalyptic number.

It is an amenable number.

66616196 is a deficient number, since it is larger than the sum of its proper divisors (49962154).

66616196 is a wasteful number, since it uses less digits than its factorization.

66616196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16654053 (or 16654051 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 66616196 is about 8161.8745395895. The cubic root of 66616196 is about 405.3777829423.

The spelling of 66616196 in words is "sixty-six million, six hundred sixteen thousand, one hundred ninety-six".