66859914 has 16 divisors (see below), whose sum is σ = 145876320. Its totient is φ = 20260560.

The previous prime is 66859853. The next prime is 66859937. The reversal of 66859914 is 41995866.

It is a Curzon 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, 506449 + ... + 506580.

It is an arithmetic number, because the mean of its divisors is an integer number (9117270).

Almost surely, 2^66859914 is an apocalyptic number.

66859914 is an abundant number, since it is smaller than the sum of its proper divisors (79016406).

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

66859914 is a wasteful number, since it uses less digits than its factorization.

66859914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013045.

The product of its digits is 466560, while the sum is 48.

The square root of 66859914 is about 8176.7911799189. The cubic root of 66859914 is about 405.8715448572.

The spelling of 66859914 in words is "sixty-six million, eight hundred fifty-nine thousand, nine hundred fourteen".