66437285 has 8 divisors (see below), whose sum is σ = 79775520. Its totient is φ = 53115984.

The previous prime is 66437269. The next prime is 66437291. The reversal of 66437285 is 58273466.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 66437285 - 2⁴ = 66437269 is a prime.

It is a Curzon 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, 7226 + ... + 13604.

It is an arithmetic number, because the mean of its divisors is an integer number (9971940).

Almost surely, 2^66437285 is an apocalyptic number.

It is an amenable number.

66437285 is a deficient number, since it is larger than the sum of its proper divisors (13338235).

66437285 is a wasteful number, since it uses less digits than its factorization.

66437285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8467.

The product of its digits is 241920, while the sum is 41.

The square root of 66437285 is about 8150.9070047449. The cubic root of 66437285 is about 405.0145501047.

The spelling of 66437285 in words is "sixty-six million, four hundred thirty-seven thousand, two hundred eighty-five".