66425574 has 8 divisors (see below), whose sum is σ = 132851160. Its totient is φ = 22141856.

The previous prime is 66425561. The next prime is 66425621. The reversal of 66425574 is 47552466.

It is a sphenic number, since it is the product of 3 distinct primes.

66425574 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535459 + ... + 5535470.

It is an arithmetic number, because the mean of its divisors is an integer number (16606395).

Almost surely, 2^66425574 is an apocalyptic number.

66425574 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66425574 is a wasteful number, since it uses less digits than its factorization.

66425574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070934.

The product of its digits is 201600, while the sum is 39.

The square root of 66425574 is about 8150.1885867752. The cubic root of 66425574 is about 404.9907511986.

The spelling of 66425574 in words is "sixty-six million, four hundred twenty-five thousand, five hundred seventy-four".