1670653205 has 16 divisors (see below), whose sum is σ = 2160015984. Its totient is φ = 1233131520.

The previous prime is 1670653183. The next prime is 1670653219. The reversal of 1670653205 is 5023560761.

It can be written as a sum of positive squares in 8 ways, for example, as 525372241 + 1145280964 = 22921^2 + 33842^2 .

It is not a de Polignac number, because 1670653205 - 2²⁴ = 1653875989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173477 + ... + 182853.

It is an arithmetic number, because the mean of its divisors is an integer number (135000999).

Almost surely, 2^1670653205 is an apocalyptic number.

It is an amenable number.

1670653205 is a deficient number, since it is larger than the sum of its proper divisors (489362779).

1670653205 is a wasteful number, since it uses less digits than its factorization.

1670653205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12136.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 1670653205 is about 40873.6248086709. The cubic root of 1670653205 is about 1186.5756615586.

The spelling of 1670653205 in words is "one billion, six hundred seventy million, six hundred fifty-three thousand, two hundred five".