5661615366 has 80 divisors (see below), whose sum is σ = 14653671120. Its totient is φ = 1614712320.

The previous prime is 5661615299. The next prime is 5661615367. The reversal of 5661615366 is 6635161665.

5661615366 is a `hidden beast` number, since 56 + 6 + 1 + 61 + 536 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661615367) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63151 + ... + 123738.

It is an arithmetic number, because the mean of its divisors is an integer number (183170889).

Almost surely, 2^5661615366 is an apocalyptic number.

5661615366 is an abundant number, since it is smaller than the sum of its proper divisors (8992055754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661615366 is a wasteful number, since it uses less digits than its factorization.

5661615366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186931 (or 186922 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 5661615366 is about 75243.7064876525. The cubic root of 5661615366 is about 1782.2971820116.

The spelling of 5661615366 in words is "five billion, six hundred sixty-one million, six hundred fifteen thousand, three hundred sixty-six".