5661605506 has 32 divisors (see below), whose sum is σ = 9043349760. Its totient is φ = 2649113856.

The previous prime is 5661605501. The next prime is 5661605513. The reversal of 5661605506 is 6055061665.

It is not an unprimeable number, because it can be changed into a prime (5661605501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7723516 + ... + 7724248.

It is an arithmetic number, because the mean of its divisors is an integer number (282604680).

Almost surely, 2^5661605506 is an apocalyptic number.

5661605506 is a deficient number, since it is larger than the sum of its proper divisors (3381744254).

5661605506 is a wasteful number, since it uses less digits than its factorization.

5661605506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 5661605506 is about 75243.6409671940. The cubic root of 5661605506 is about 1782.2961473563.

The spelling of 5661605506 in words is "five billion, six hundred sixty-one million, six hundred five thousand, five hundred six".