66111453 has 24 divisors (see below), whose sum is σ = 105513408. Its totient is φ = 39676032.

The previous prime is 66111439. The next prime is 66111457. The reversal of 66111453 is 35411166.

66111453 is a `hidden beast` number, since 6 + 611 + 1 + 45 + 3 = 666.

It is not a de Polignac number, because 66111453 - 2⁵ = 66111421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66111457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5875 + ... + 12912.

It is an arithmetic number, because the mean of its divisors is an integer number (4396392).

Almost surely, 2^66111453 is an apocalyptic number.

It is an amenable number.

66111453 is a deficient number, since it is larger than the sum of its proper divisors (39401955).

66111453 is a wasteful number, since it uses less digits than its factorization.

66111453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18833 (or 18830 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 66111453 is about 8130.8949691900. The cubic root of 66111453 is about 404.3513530872.

It can be divided in two parts, 66111 and 453, that added together give a square (66564 = 258²).

The spelling of 66111453 in words is "sixty-six million, one hundred eleven thousand, four hundred fifty-three".