10661655572 has 6 divisors (see below), whose sum is σ = 18657897258. Its totient is φ = 5330827784.

The previous prime is 10661655569. The next prime is 10661655607. The reversal of 10661655572 is 27555616601.

It can be written as a sum of positive squares in only one way, i.e., 8857444996 + 1804210576 = 94114^2 + 42476^2 .

It is a super-2 number, since 2×10661655572² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332706943 + ... + 1332706950.

It is an arithmetic number, because the mean of its divisors is an integer number (3109649543).

Almost surely, 2^10661655572 is an apocalyptic number.

It is an amenable number.

10661655572 is a deficient number, since it is larger than the sum of its proper divisors (7996241686).

10661655572 is a wasteful number, since it uses less digits than its factorization.

10661655572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665413897 (or 2665413895 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 10661655572 in words is "ten billion, six hundred sixty-one million, six hundred fifty-five thousand, five hundred seventy-two".