66670875 has 24 divisors (see below), whose sum is σ = 120187392. Its totient is φ = 35557200.

The previous prime is 66670847. The next prime is 66670897. The reversal of 66670875 is 57807666.

It is not a de Polignac number, because 66670875 - 2⁶ = 66670811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 66670875.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28507 + ... + 30756.

It is an arithmetic number, because the mean of its divisors is an integer number (5007808).

Almost surely, 2^66670875 is an apocalyptic number.

66670875 is a deficient number, since it is larger than the sum of its proper divisors (53516517).

66670875 is a wasteful number, since it uses less digits than its factorization.

66670875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59284 (or 59271 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 66670875 is about 8165.2235119438. The cubic root of 66670875 is about 405.4886648365.

The spelling of 66670875 in words is "sixty-six million, six hundred seventy thousand, eight hundred seventy-five".