66874285 has 8 divisors (see below), whose sum is σ = 82838016. Its totient is φ = 51773520.

The previous prime is 66874273. The next prime is 66874309. The reversal of 66874285 is 58247866.

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

It is not a de Polignac number, because 66874285 - 2²¹ = 64777133 is a prime.

It is a super-2 number, since 2×66874285² = 8944339988522450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 215569 + ... + 215878.

It is an arithmetic number, because the mean of its divisors is an integer number (10354752).

Almost surely, 2^66874285 is an apocalyptic number.

It is an amenable number.

66874285 is a deficient number, since it is larger than the sum of its proper divisors (15963731).

66874285 is a wasteful number, since it uses less digits than its factorization.

66874285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431483.

The product of its digits is 645120, while the sum is 46.

The square root of 66874285 is about 8177.6699004056. The cubic root of 66874285 is about 405.9006223805.

The spelling of 66874285 in words is "sixty-six million, eight hundred seventy-four thousand, two hundred eighty-five".