66685274 has 8 divisors (see below), whose sum is σ = 100078740. Its totient is φ = 33325696.

The previous prime is 66685253. The next prime is 66685277. The reversal of 66685274 is 47258666.

It can be written as a sum of positive squares in 2 ways, for example, as 60949249 + 5736025 = 7807^2 + 2395^2 .

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

It is a super-3 number, since 3×66685274³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66685277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789 + ... + 11880.

Almost surely, 2^66685274 is an apocalyptic number.

66685274 is a deficient number, since it is larger than the sum of its proper divisors (33393466).

66685274 is a wasteful number, since it uses less digits than its factorization.

66685274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16944.

The product of its digits is 483840, while the sum is 44.

The square root of 66685274 is about 8166.1051915831. The cubic root of 66685274 is about 405.5178540490.

The spelling of 66685274 in words is "sixty-six million, six hundred eighty-five thousand, two hundred seventy-four".