12665241650 has 12 divisors (see below), whose sum is σ = 23557349562. Its totient is φ = 5066096640.

The previous prime is 12665241643. The next prime is 12665241661. The reversal of 12665241650 is 5614256621.

It can be written as a sum of positive squares in 3 ways, for example, as 12252054721 + 413186929 = 110689^2 + 20327^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 126652367 + ... + 126652466.

Almost surely, 2^12665241650 is an apocalyptic number.

12665241650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12665241650 is a deficient number, since it is larger than the sum of its proper divisors (10892107912).

12665241650 is a wasteful number, since it uses less digits than its factorization.

12665241650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253304845 (or 253304840 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 12665241650 in words is "twelve billion, six hundred sixty-five million, two hundred forty-one thousand, six hundred fifty".