66399500119 has 4 divisors (see below), whose sum is σ = 66418265880. Its totient is φ = 66380734360.

The previous prime is 66399500077. The next prime is 66399500159. The reversal of 66399500119 is 91100599366.

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 66399500119 - 2¹¹ = 66399498071 is a prime.

It is a super-2 number, since 2×66399500119² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66399500159) 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, 9377572 + ... + 9384649.

It is an arithmetic number, because the mean of its divisors is an integer number (16604566470).

Almost surely, 2^66399500119 is an apocalyptic number.

66399500119 is a deficient number, since it is larger than the sum of its proper divisors (18765761).

66399500119 is a wasteful number, since it uses less digits than its factorization.

66399500119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765760.

The product of its (nonzero) digits is 393660, while the sum is 49.

The spelling of 66399500119 in words is "sixty-six billion, three hundred ninety-nine million, five hundred thousand, one hundred nineteen".