66875885 has 16 divisors (see below), whose sum is σ = 83341440. Its totient is φ = 51455040.

The previous prime is 66875869. The next prime is 66875911. The reversal of 66875885 is 58857866.

It is not a de Polignac number, because 66875885 - 2⁴ = 66875869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44354 + ... + 45836.

It is an arithmetic number, because the mean of its divisors is an integer number (5208840).

Almost surely, 2^66875885 is an apocalyptic number.

It is an amenable number.

66875885 is a deficient number, since it is larger than the sum of its proper divisors (16465555).

66875885 is a wasteful number, since it uses less digits than its factorization.

66875885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828.

The product of its digits is 3225600, while the sum is 53.

The square root of 66875885 is about 8177.7677271979. The cubic root of 66875885 is about 405.9038594783.

The spelling of 66875885 in words is "sixty-six million, eight hundred seventy-five thousand, eight hundred eighty-five".