66051199 has 4 divisors (see below), whose sum is σ = 66080520. Its totient is φ = 66021880.

The previous prime is 66051191. The next prime is 66051217. The reversal of 66051199 is 99115066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66051199 - 2³ = 66051191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66051191) 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, 10972 + ... + 15889.

It is an arithmetic number, because the mean of its divisors is an integer number (16520130).

Almost surely, 2^66051199 is an apocalyptic number.

66051199 is a deficient number, since it is larger than the sum of its proper divisors (29321).

66051199 is a wasteful number, since it uses less digits than its factorization.

66051199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29320.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 66051199 is about 8127.1888743895. The cubic root of 66051199 is about 404.2284737635.

The spelling of 66051199 in words is "sixty-six million, fifty-one thousand, one hundred ninety-nine".