1265617066 has 16 divisors (see below), whose sum is σ = 2170097280. Its totient is φ = 542290320.

The previous prime is 1265617039. The next prime is 1265617121. The reversal of 1265617066 is 6607165621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100320 + ... + 112228.

It is an arithmetic number, because the mean of its divisors is an integer number (135631080).

Almost surely, 2^1265617066 is an apocalyptic number.

1265617066 is a deficient number, since it is larger than the sum of its proper divisors (904480214).

1265617066 is a wasteful number, since it uses less digits than its factorization.

1265617066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19509.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1265617066 is about 35575.5121677819. The cubic root of 1265617066 is about 1081.6849174181.

The spelling of 1265617066 in words is "one billion, two hundred sixty-five million, six hundred seventeen thousand, sixty-six".