66124623163 has 4 divisors (see below), whose sum is σ = 66320839000. Its totient is φ = 65928407328.

The previous prime is 66124623161. The next prime is 66124623179. The reversal of 66124623163 is 36132642166.

It is a happy number.

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 66124623163 - 2¹ = 66124623161 is a prime.

It is a super-2 number, since 2×66124623163² (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 (66124623161) 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, 98107413 + ... + 98108086.

It is an arithmetic number, because the mean of its divisors is an integer number (16580209750).

Almost surely, 2^66124623163 is an apocalyptic number.

66124623163 is a deficient number, since it is larger than the sum of its proper divisors (196215837).

66124623163 is a wasteful number, since it uses less digits than its factorization.

66124623163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196215836.

The product of its digits is 186624, while the sum is 40.

The spelling of 66124623163 in words is "sixty-six billion, one hundred twenty-four million, six hundred twenty-three thousand, one hundred sixty-three".