66724611 has 8 divisors (see below), whose sum is σ = 89014464. Its totient is φ = 44458920.

The previous prime is 66724601. The next prime is 66724639. The reversal of 66724611 is 11642766.

66724611 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.

It is not a de Polignac number, because 66724611 - 2⁶ = 66724547 is a prime.

It is a super-3 number, since 3×66724611³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66724601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1896 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (11126808).

Almost surely, 2^66724611 is an apocalyptic number.

66724611 is a deficient number, since it is larger than the sum of its proper divisors (22289853).

66724611 is a wasteful number, since it uses less digits than its factorization.

66724611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12081.

The product of its digits is 12096, while the sum is 33.

The square root of 66724611 is about 8168.5133898403. The cubic root of 66724611 is about 405.5975753991.

The spelling of 66724611 in words is "sixty-six million, seven hundred twenty-four thousand, six hundred eleven".