10003235661 has 6 divisors (see below), whose sum is σ = 14449118190. Its totient is φ = 6668823768.

The previous prime is 10003235633. The next prime is 10003235681. The reversal of 10003235661 is 16653230001.

10003235661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6211016100 + 3792219561 = 78810^2 + 61581^2 .

It is not a de Polignac number, because 10003235661 - 2⁵ = 10003235629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10003235621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555735306 + ... + 555735323.

It is an arithmetic number, because the mean of its divisors is an integer number (2408186365).

Almost surely, 2^10003235661 is an apocalyptic number.

It is an amenable number.

10003235661 is a deficient number, since it is larger than the sum of its proper divisors (4445882529).

10003235661 is a wasteful number, since it uses less digits than its factorization.

10003235661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111470635 (or 1111470632 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 10003235661 its reverse (16653230001), we get a palindrome (26656465662).

The spelling of 10003235661 in words is "ten billion, three million, two hundred thirty-five thousand, six hundred sixty-one".