66199436 has 6 divisors (see below), whose sum is σ = 115849020. Its totient is φ = 33099716.

The previous prime is 66199421. The next prime is 66199447. The reversal of 66199436 is 63499166.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8274926 + ... + 8274933.

It is an arithmetic number, because the mean of its divisors is an integer number (19308170).

Almost surely, 2^66199436 is an apocalyptic number.

It is an amenable number.

66199436 is a deficient number, since it is larger than the sum of its proper divisors (49649584).

66199436 is a wasteful number, since it uses less digits than its factorization.

66199436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16549863 (or 16549861 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 66199436 is about 8136.3035833233. The cubic root of 66199436 is about 404.5306476636.

The spelling of 66199436 in words is "sixty-six million, one hundred ninety-nine thousand, four hundred thirty-six".