66474825 has 24 divisors (see below), whose sum is σ = 115692000. Its totient is φ = 33586560.

The previous prime is 66474803. The next prime is 66474841. The reversal of 66474825 is 52847466.

It is not a de Polignac number, because 66474825 - 2¹⁶ = 66409289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21900 + ... + 24749.

It is an arithmetic number, because the mean of its divisors is an integer number (4820500).

Almost surely, 2^66474825 is an apocalyptic number.

It is an amenable number.

66474825 is a deficient number, since it is larger than the sum of its proper divisors (49217175).

66474825 is a wasteful number, since it uses less digits than its factorization.

66474825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46681 (or 46676 counting only the distinct ones).

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

The square root of 66474825 is about 8153.2094907466. The cubic root of 66474825 is about 405.0908194436.

The spelling of 66474825 in words is "sixty-six million, four hundred seventy-four thousand, eight hundred twenty-five".