66000363899 has 4 divisors (see below), whose sum is σ = 69882738264. Its totient is φ = 62117989536.

The previous prime is 66000363857. The next prime is 66000363901. The reversal of 66000363899 is 99836300066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66000363899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66000363809) 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, 1941187157 + ... + 1941187190.

It is an arithmetic number, because the mean of its divisors is an integer number (17470684566).

Almost surely, 2^66000363899 is an apocalyptic number.

66000363899 is a deficient number, since it is larger than the sum of its proper divisors (3882374365).

66000363899 is a wasteful number, since it uses less digits than its factorization.

66000363899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882374364.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 66000363899 in words is "sixty-six billion, three hundred sixty-three thousand, eight hundred ninety-nine".