561166697 has 12 divisors (see below), whose sum is σ = 694463040. Its totient is φ = 443999088.

The previous prime is 561166687. The next prime is 561166709. The reversal of 561166697 is 796661165.

It is a happy number.

561166697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561166697 - 2¹² = 561162601 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561166637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 235997 + ... + 238362.

It is an arithmetic number, because the mean of its divisors is an integer number (57871920).

Almost surely, 2^561166697 is an apocalyptic number.

It is an amenable number.

561166697 is a deficient number, since it is larger than the sum of its proper divisors (133296343).

561166697 is a wasteful number, since it uses less digits than its factorization.

561166697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474392 (or 474379 counting only the distinct ones).

The product of its digits is 408240, while the sum is 47.

The square root of 561166697 is about 23688.9572797116. The cubic root of 561166697 is about 824.8290785185.

The spelling of 561166697 in words is "five hundred sixty-one million, one hundred sixty-six thousand, six hundred ninety-seven".