66883207 has 4 divisors (see below), whose sum is σ = 67825296. Its totient is φ = 65941120.

The previous prime is 66883199. The next prime is 66883237. The reversal of 66883207 is 70238866.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66883207 - 2³ = 66883199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66883207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470938 + ... + 471079.

It is an arithmetic number, because the mean of its divisors is an integer number (16956324).

Almost surely, 2^66883207 is an apocalyptic number.

66883207 is a deficient number, since it is larger than the sum of its proper divisors (942089).

66883207 is an equidigital number, since it uses as much as digits as its factorization.

66883207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942088.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 66883207 is about 8178.2153921256. The cubic root of 66883207 is about 405.9186725887.

The spelling of 66883207 in words is "sixty-six million, eight hundred eighty-three thousand, two hundred seven".