661103524 has 12 divisors (see below), whose sum is σ = 1160086144. Its totient is φ = 329650344.

The previous prime is 661103477. The next prime is 661103533. The reversal of 661103524 is 425301166.

It is a junction number, because it is equal to n+sod(n) for n = 661103492 and 661103501.

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, 223704 + ... + 226639.

Almost surely, 2^661103524 is an apocalyptic number.

It is an amenable number.

661103524 is a deficient number, since it is larger than the sum of its proper divisors (498982620).

661103524 is a wasteful number, since it uses less digits than its factorization.

661103524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450714 (or 450712 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 661103524 is about 25711.9334940024. The cubic root of 661103524 is about 871.1437478348.

The spelling of 661103524 in words is "six hundred sixty-one million, one hundred three thousand, five hundred twenty-four".