1306266165 has 48 divisors (see below), whose sum is σ = 2318150016. Its totient is φ = 680265600.

The previous prime is 1306266149. The next prime is 1306266193. The reversal of 1306266165 is 5616626031.

1306266165 is a `hidden beast` number, since 1 + 30 + 6 + 2 + 6 + 616 + 5 = 666.

It is not a de Polignac number, because 1306266165 - 2⁴ = 1306266149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 339955 + ... + 343775.

It is an arithmetic number, because the mean of its divisors is an integer number (48294792).

Almost surely, 2^1306266165 is an apocalyptic number.

1306266165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1306266165 is a deficient number, since it is larger than the sum of its proper divisors (1011883851).

1306266165 is a wasteful number, since it uses less digits than its factorization.

1306266165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010 (or 4007 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1306266165 is about 36142.3043675967. The cubic root of 1306266165 is about 1093.1436238757.

The spelling of 1306266165 in words is "one billion, three hundred six million, two hundred sixty-six thousand, one hundred sixty-five".