1266450165 has 24 divisors (see below), whose sum is σ = 2198208480. Its totient is φ = 674508384.

The previous prime is 1266450151. The next prime is 1266450169. The reversal of 1266450165 is 5610546621.

1266450165 is a `hidden beast` number, since 1 + 2 + 6 + 645 + 0 + 1 + 6 + 5 = 666.

It is not a de Polignac number, because 1266450165 - 2⁸ = 1266449909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266450169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14214 + ... + 52296.

It is an arithmetic number, because the mean of its divisors is an integer number (91592020).

Almost surely, 2^1266450165 is an apocalyptic number.

1266450165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266450165 is a deficient number, since it is larger than the sum of its proper divisors (931758315).

1266450165 is a wasteful number, since it uses less digits than its factorization.

1266450165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38833 (or 38830 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1266450165 is about 35587.2191242867. The cubic root of 1266450165 is about 1081.9222069296.

Adding to 1266450165 its reverse (5610546621), we get a palindrome (6876996786).

The spelling of 1266450165 in words is "one billion, two hundred sixty-six million, four hundred fifty thousand, one hundred sixty-five".