10661655571 has 8 divisors (see below), whose sum is σ = 12217419104. Its totient is φ = 9114059520.

The previous prime is 10661655569. The next prime is 10661655607. The reversal of 10661655571 is 17555616601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10661655571 - 2¹ = 10661655569 is a prime.

It is a super-2 number, since 2×10661655571² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10661655541) 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, 2039070 + ... + 2044291.

It is an arithmetic number, because the mean of its divisors is an integer number (1527177388).

Almost surely, 2^10661655571 is an apocalyptic number.

10661655571 is a deficient number, since it is larger than the sum of its proper divisors (1555763533).

10661655571 is an equidigital number, since it uses as much as digits as its factorization.

10661655571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4083741.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 10661655571 in words is "ten billion, six hundred sixty-one million, six hundred fifty-five thousand, five hundred seventy-one".