10661225636 has 24 divisors (see below), whose sum is σ = 19124507136. Its totient is φ = 5197919040.

The previous prime is 10661225633. The next prime is 10661225639. The reversal of 10661225636 is 63652216601.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10661225633) and next prime (10661225639).

It is a super-2 number, since 2×10661225636² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10661225636.

It is not an unprimeable number, because it can be changed into a prime (10661225633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53681 + ... + 155576.

It is an arithmetic number, because the mean of its divisors is an integer number (796854464).

Almost surely, 2^10661225636 is an apocalyptic number.

It is an amenable number.

10661225636 is a deficient number, since it is larger than the sum of its proper divisors (8463281500).

10661225636 is a wasteful number, since it uses less digits than its factorization.

10661225636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209579 (or 209577 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 10661225636 in words is "ten billion, six hundred sixty-one million, two hundred twenty-five thousand, six hundred thirty-six".