1670712205 has 8 divisors (see below), whose sum is σ = 2024705304. Its totient is φ = 1323336000.

The previous prime is 1670712193. The next prime is 1670712217. The reversal of 1670712205 is 5022170761.

It is an interprime number because it is at equal distance from previous prime (1670712193) and next prime (1670712217).

It can be written as a sum of positive squares in 4 ways, for example, as 697646569 + 973065636 = 26413^2 + 31194^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1670712205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653666 + ... + 1654675.

It is an arithmetic number, because the mean of its divisors is an integer number (253088163).

Almost surely, 2^1670712205 is an apocalyptic number.

It is an amenable number.

1670712205 is a deficient number, since it is larger than the sum of its proper divisors (353993099).

1670712205 is a wasteful number, since it uses less digits than its factorization.

1670712205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308447.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1670712205 is about 40874.3465391191. The cubic root of 1670712205 is about 1186.5896295762.

Adding to 1670712205 its reverse (5022170761), we get a palindrome (6692882966).

The spelling of 1670712205 in words is "one billion, six hundred seventy million, seven hundred twelve thousand, two hundred five".