66123450 has 36 divisors (see below), whose sum is σ = 177652878. Its totient is φ = 17632800.

The previous prime is 66123443. The next prime is 66123479. The reversal of 66123450 is 5432166.

66123450 is a `hidden beast` number, since 6 + 612 + 3 + 45 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 45846441 + 20277009 = 6771^2 + 4503^2 .

It is a Curzon number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 73021 + ... + 73920.

Almost surely, 2^66123450 is an apocalyptic number.

66123450 is an abundant number, since it is smaller than the sum of its proper divisors (111529428).

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

66123450 is a wasteful number, since it uses less digits than its factorization.

66123450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146959 (or 146951 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 66123450 is about 8131.6326773902. The cubic root of 66123450 is about 404.3758103210.

The spelling of 66123450 in words is "sixty-six million, one hundred twenty-three thousand, four hundred fifty".