10661605603 has 12 divisors (see below), whose sum is σ = 12335744680. Its totient is φ = 9182242080.

The previous prime is 10661605597. The next prime is 10661605609. The reversal of 10661605603 is 30650616601.

It is an interprime number because it is at equal distance from previous prime (10661605597) and next prime (10661605609).

It is not a de Polignac number, because 10661605603 - 2⁹ = 10661605091 is a prime.

It is a super-2 number, since 2×10661605603² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10661605609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2316450 + ... + 2321047.

Almost surely, 2^10661605603 is an apocalyptic number.

10661605603 is a deficient number, since it is larger than the sum of its proper divisors (1674139077).

10661605603 is a wasteful number, since it uses less digits than its factorization.

10661605603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637538 (or 4637527 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 10661605603 in words is "ten billion, six hundred sixty-one million, six hundred five thousand, six hundred three".