66883917 has 16 divisors (see below), whose sum is σ = 91359360. Its totient is φ = 43512000.

The previous prime is 66883913. The next prime is 66883939. The reversal of 66883917 is 71938866.

It is not a de Polignac number, because 66883917 - 2² = 66883913 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66883913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19959 + ... + 23067.

It is an arithmetic number, because the mean of its divisors is an integer number (5709960).

Almost surely, 2^66883917 is an apocalyptic number.

It is an amenable number.

66883917 is a deficient number, since it is larger than the sum of its proper divisors (24475443).

66883917 is a wasteful number, since it uses less digits than its factorization.

66883917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284.

The product of its digits is 435456, while the sum is 48.

The square root of 66883917 is about 8178.2588000136. The cubic root of 66883917 is about 405.9201089295.

The spelling of 66883917 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred seventeen".