66725874 has 24 divisors (see below), whose sum is σ = 148481580. Its totient is φ = 21640608.

The previous prime is 66725863. The next prime is 66725899. The reversal of 66725874 is 47852766.

66725874 is a `hidden beast` number, since 6 + 67 + 2 + 587 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66536649 + 189225 = 8157^2 + 435^2 .

It is a super-2 number, since 2×66725874² = 8904684522127752, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 49429 + ... + 50760.

Almost surely, 2^66725874 is an apocalyptic number.

66725874 is an abundant number, since it is smaller than the sum of its proper divisors (81755706).

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

66725874 is a wasteful number, since it uses less digits than its factorization.

66725874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100234 (or 100231 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 66725874 is about 8168.5906985232. The cubic root of 66725874 is about 405.6001345074.

The spelling of 66725874 in words is "sixty-six million, seven hundred twenty-five thousand, eight hundred seventy-four".