10661565436 has 24 divisors (see below), whose sum is σ = 20128001040. Its totient is φ = 4922541312.

The previous prime is 10661565427. The next prime is 10661565457. The reversal of 10661565436 is 63456516601.

It is a super-2 number, since 2×10661565436² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10661565392 and 10661565401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1475526 + ... + 1482733.

It is an arithmetic number, because the mean of its divisors is an integer number (838666710).

Almost surely, 2^10661565436 is an apocalyptic number.

It is an amenable number.

10661565436 is a deficient number, since it is larger than the sum of its proper divisors (9466435604).

10661565436 is a wasteful number, since it uses less digits than its factorization.

10661565436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958333 (or 2958331 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 10661565436 in words is "ten billion, six hundred sixty-one million, five hundred sixty-five thousand, four hundred thirty-six".