10661486988 has 54 divisors (see below), whose sum is σ = 25533474708. Its totient is φ = 3462381120.

The previous prime is 10661486939. The next prime is 10661486993. The reversal of 10661486988 is 88968416601.

It is a super-2 number, since 2×10661486988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14664681 + ... + 14665407.

Almost surely, 2^10661486988 is an apocalyptic number.

It is an amenable number.

10661486988 is an abundant number, since it is smaller than the sum of its proper divisors (14871987720).

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

10661486988 is an frugal number, since it uses more digits than its factorization.

10661486988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 10661486988 in words is "ten billion, six hundred sixty-one million, four hundred eighty-six thousand, nine hundred eighty-eight".