10661605604 has 12 divisors (see below), whose sum is σ = 20093026044. Its totient is φ = 4920741024.

The previous prime is 10661605597. The next prime is 10661605609. The reversal of 10661605604 is 40650616601.

It can be written as a sum of positive squares in 2 ways, for example, as 647600704 + 10014004900 = 25448^2 + 100070^2 .

It is a super-2 number, since 2×10661605604² (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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102515387 + ... + 102515490.

It is an arithmetic number, because the mean of its divisors is an integer number (1674418837).

Almost surely, 2^10661605604 is an apocalyptic number.

It is an amenable number.

10661605604 is a deficient number, since it is larger than the sum of its proper divisors (9431420440).

10661605604 is a wasteful number, since it uses less digits than its factorization.

10661605604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205030894 (or 205030892 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 10661605604 in words is "ten billion, six hundred sixty-one million, six hundred five thousand, six hundred four".