66724223777134 has 64 divisors (see below), whose sum is σ = 128316282554880. Its totient is φ = 25262106007680.

The previous prime is 66724223777119. The next prime is 66724223777137. The reversal of 66724223777134 is 43177732242766.

It is a happy number.

It is a super-2 number, since 2×66724223777134² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66724223777137) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2805064 + ... + 11887675.

It is an arithmetic number, because the mean of its divisors is an integer number (2004941914920).

Almost surely, 2^{66724223777134} is an apocalyptic number.

66724223777134 is a deficient number, since it is larger than the sum of its proper divisors (61592058777746).

66724223777134 is a wasteful number, since it uses less digits than its factorization.

66724223777134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14693593.

The product of its digits is 99574272, while the sum is 61.

The spelling of 66724223777134 in words is "sixty-six trillion, seven hundred twenty-four billion, two hundred twenty-three million, seven hundred seventy-seven thousand, one hundred thirty-four".