66724134 has 8 divisors (see below), whose sum is σ = 133448280. Its totient is φ = 22241376.

The previous prime is 66724129. The next prime is 66724159. The reversal of 66724134 is 43142766.

It is a happy number.

66724134 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

66724134 is an admirable number.

It is a super-2 number, since 2×66724134² = 8904220116099912, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 66724095 and 66724104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5560339 + ... + 5560350.

It is an arithmetic number, because the mean of its divisors is an integer number (16681035).

Almost surely, 2^66724134 is an apocalyptic number.

66724134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66724134 is a wasteful number, since it uses less digits than its factorization.

66724134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11120694.

The product of its digits is 24192, while the sum is 33.

The square root of 66724134 is about 8168.4841923089. The cubic root of 66724134 is about 405.5966088867.

The spelling of 66724134 in words is "sixty-six million, seven hundred twenty-four thousand, one hundred thirty-four".