561532667 has 4 divisors (see below), whose sum is σ = 579646656. Its totient is φ = 543418680.

The previous prime is 561532613. The next prime is 561532691. The reversal of 561532667 is 766235165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561532667 - 2¹² = 561528571 is a prime.

It is a super-2 number, since 2×561532667² = 630637872216265778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561531667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9056948 + ... + 9057009.

It is an arithmetic number, because the mean of its divisors is an integer number (144911664).

Almost surely, 2^561532667 is an apocalyptic number.

561532667 is a deficient number, since it is larger than the sum of its proper divisors (18113989).

561532667 is a wasteful number, since it uses less digits than its factorization.

561532667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18113988.

The product of its digits is 226800, while the sum is 41.

The square root of 561532667 is about 23696.6805059274. The cubic root of 561532667 is about 825.0083461659.

The spelling of 561532667 in words is "five hundred sixty-one million, five hundred thirty-two thousand, six hundred sixty-seven".