10711211661 has 20 divisors (see below), whose sum is σ = 16013383452. Its totient is φ = 7135147008.

The previous prime is 10711211653. The next prime is 10711211681. The reversal of 10711211661 is 16611211701.

It can be written as a sum of positive squares in 2 ways, for example, as 2392677225 + 8318534436 = 48915^2 + 91206^2 .

It is not a de Polignac number, because 10711211661 - 2³ = 10711211653 is a prime.

It is a super-2 number, since 2×10711211661² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10711211681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51661 + ... + 155213.

Almost surely, 2^10711211661 is an apocalyptic number.

It is an amenable number.

10711211661 is a deficient number, since it is larger than the sum of its proper divisors (5302171791).

10711211661 is a wasteful number, since it uses less digits than its factorization.

10711211661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104842 (or 104833 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The spelling of 10711211661 in words is "ten billion, seven hundred eleven million, two hundred eleven thousand, six hundred sixty-one".