561667799 has 16 divisors (see below), whose sum is σ = 700793856. Its totient is φ = 437330400.

The previous prime is 561667793. The next prime is 561667819. The reversal of 561667799 is 997766165.

It is a cyclic number.

It is not a de Polignac number, because 561667799 - 2⁴ = 561667783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561667793) 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, 163154 + ... + 166560.

It is an arithmetic number, because the mean of its divisors is an integer number (43799616).

Almost surely, 2^561667799 is an apocalyptic number.

561667799 is a deficient number, since it is larger than the sum of its proper divisors (139126057).

561667799 is a wasteful number, since it uses less digits than its factorization.

561667799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5566.

The product of its digits is 4286520, while the sum is 56.

The square root of 561667799 is about 23699.5316198443. The cubic root of 561667799 is about 825.0745198680.

The spelling of 561667799 in words is "five hundred sixty-one million, six hundred sixty-seven thousand, seven hundred ninety-nine".