11865966650 has 12 divisors (see below), whose sum is σ = 22070698062. Its totient is φ = 4746386640.

The previous prime is 11865966649. The next prime is 11865966677. The reversal of 11865966650 is 5666956811.

It can be written as a sum of positive squares in 3 ways, for example, as 4391845441 + 7474121209 = 66271^2 + 86453^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11865966592 and 11865966601.

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 5 ways as a sum of consecutive naturals, for example, 118659617 + ... + 118659716.

Almost surely, 2^11865966650 is an apocalyptic number.

11865966650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11865966650 is a deficient number, since it is larger than the sum of its proper divisors (10204731412).

11865966650 is a wasteful number, since it uses less digits than its factorization.

11865966650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237319345 (or 237319340 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 11865966650 in words is "eleven billion, eight hundred sixty-five million, nine hundred sixty-six thousand, six hundred fifty".