66118492369 has 4 divisors (see below), whose sum is σ = 69598413040. Its totient is φ = 62638571700.

The previous prime is 66118492301. The next prime is 66118492381. The reversal of 66118492369 is 96329481166.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96329481166 = 2 ⋅48164740583.

It is a cyclic number.

It is not a de Polignac number, because 66118492369 - 2²⁵ = 66084937937 is a prime.

It is a super-2 number, since 2×66118492369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66118492399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739960307 + ... + 1739960344.

It is an arithmetic number, because the mean of its divisors is an integer number (17399603260).

Almost surely, 2^66118492369 is an apocalyptic number.

It is an amenable number.

66118492369 is a deficient number, since it is larger than the sum of its proper divisors (3479920671).

66118492369 is a wasteful number, since it uses less digits than its factorization.

66118492369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479920670.

The product of its digits is 3359232, while the sum is 55.

The spelling of 66118492369 in words is "sixty-six billion, one hundred eighteen million, four hundred ninety-two thousand, three hundred sixty-nine".