66243774 has 16 divisors (see below), whose sum is σ = 135307008. Its totient is φ = 21611352.

The previous prime is 66243767. The next prime is 66243797. The reversal of 66243774 is 47734266.

It is a Curzon number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 117172 + ... + 117735.

It is an arithmetic number, because the mean of its divisors is an integer number (8456688).

Almost surely, 2^66243774 is an apocalyptic number.

66243774 is an abundant number, since it is smaller than the sum of its proper divisors (69063234).

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

66243774 is a wasteful number, since it uses less digits than its factorization.

66243774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234959.

The product of its digits is 169344, while the sum is 39.

The square root of 66243774 is about 8139.0278289240. The cubic root of 66243774 is about 404.6209408651.

The spelling of 66243774 in words is "sixty-six million, two hundred forty-three thousand, seven hundred seventy-four".