66193239166 has 4 divisors (see below), whose sum is σ = 99289858752. Its totient is φ = 33096619582.

The previous prime is 66193239163. The next prime is 66193239169.

66193239166 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (66193239163) and next prime (66193239169).

It is a super-2 number, since 2×66193239166² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66193239163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16548309790 + ... + 16548309793.

It is an arithmetic number, because the mean of its divisors is an integer number (24822464688).

Almost surely, 2^66193239166 is an apocalyptic number.

66193239166 is a deficient number, since it is larger than the sum of its proper divisors (33096619586).

66193239166 is a wasteful number, since it uses less digits than its factorization.

66193239166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33096619585.

The product of its digits is 1889568, while the sum is 52.

The spelling of 66193239166 in words is "sixty-six billion, one hundred ninety-three million, two hundred thirty-nine thousand, one hundred sixty-six".