10661521344 has 28 divisors (see below), whose sum is σ = 28208609064. Its totient is φ = 3553840384.

The previous prime is 10661521337. The next prime is 10661521363. The reversal of 10661521344 is 44312516601.

It is a super-2 number, since 2×10661521344² (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 in 3 ways as a sum of consecutive naturals, for example, 27764187 + ... + 27764570.

Almost surely, 2^10661521344 is an apocalyptic number.

It is an amenable number.

10661521344 is an abundant number, since it is smaller than the sum of its proper divisors (17547087720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10661521344 is an equidigital number, since it uses as much as digits as its factorization.

10661521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55528772 (or 55528762 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 10661521344 in words is "ten billion, six hundred sixty-one million, five hundred twenty-one thousand, three hundred forty-four".