5661278679 has 16 divisors (see below), whose sum is σ = 8630555648. Its totient is φ = 3233574432.

The previous prime is 5661278677. The next prime is 5661278717. The reversal of 5661278679 is 9768721665.

It is not a de Polignac number, because 5661278679 - 2¹ = 5661278677 is a prime.

It is a super-3 number, since 3×5661278679³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661278677) 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, 10912 + ... + 106965.

It is an arithmetic number, because the mean of its divisors is an integer number (539409728).

Almost surely, 2^5661278679 is an apocalyptic number.

5661278679 is a deficient number, since it is larger than the sum of its proper divisors (2969276969).

5661278679 is a wasteful number, since it uses less digits than its factorization.

5661278679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120174.

The product of its digits is 7620480, while the sum is 57.

The square root of 5661278679 is about 75241.4691443488. The cubic root of 5661278679 is about 1782.2618512124.

The spelling of 5661278679 in words is "five billion, six hundred sixty-one million, two hundred seventy-eight thousand, six hundred seventy-nine".