670217111 has 4 divisors (see below), whose sum is σ = 670271112. Its totient is φ = 670163112.

The previous prime is 670217099. The next prime is 670217123. The reversal of 670217111 is 111712076.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (670217099) and next prime (670217123).

It is a cyclic number.

It is not a de Polignac number, because 670217111 - 2¹⁰ = 670216087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670217131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2000 + ... + 36666.

It is an arithmetic number, because the mean of its divisors is an integer number (167567778).

Almost surely, 2^670217111 is an apocalyptic number.

670217111 is a deficient number, since it is larger than the sum of its proper divisors (54001).

670217111 is a wasteful number, since it uses less digits than its factorization.

670217111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54000.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 670217111 is about 25888.5517362405. The cubic root of 670217111 is about 875.1285192447.

Adding to 670217111 its reverse (111712076), we get a palindrome (781929187).

The spelling of 670217111 in words is "six hundred seventy million, two hundred seventeen thousand, one hundred eleven".