66825474 has 16 divisors (see below), whose sum is σ = 136173312. Its totient is φ = 21854768.

The previous prime is 66825467. The next prime is 66825497. The reversal of 66825474 is 47452866.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104754 + ... + 105389.

It is an arithmetic number, because the mean of its divisors is an integer number (8510832).

Almost surely, 2^66825474 is an apocalyptic number.

66825474 is an abundant number, since it is smaller than the sum of its proper divisors (69347838).

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

66825474 is a wasteful number, since it uses less digits than its factorization.

66825474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210201.

The product of its digits is 322560, while the sum is 42.

The square root of 66825474 is about 8174.6849480576. The cubic root of 66825474 is about 405.8018438164.

The spelling of 66825474 in words is "sixty-six million, eight hundred twenty-five thousand, four hundred seventy-four".