66875898 has 16 divisors (see below), whose sum is σ = 133871040. Its totient is φ = 22272096.

The previous prime is 66875869. The next prime is 66875911. The reversal of 66875898 is 89857866.

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, 3411 + ... + 12057.

It is an arithmetic number, because the mean of its divisors is an integer number (8366940).

Almost surely, 2^66875898 is an apocalyptic number.

66875898 is an abundant number, since it is smaller than the sum of its proper divisors (66995142).

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

66875898 is a wasteful number, since it uses less digits than its factorization.

66875898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9941.

The product of its digits is 5806080, while the sum is 57.

The square root of 66875898 is about 8177.7685220358. The cubic root of 66875898 is about 405.9038857795.

The spelling of 66875898 in words is "sixty-six million, eight hundred seventy-five thousand, eight hundred ninety-eight".