11561667 has 32 divisors (see below), whose sum is σ = 17504256. Its totient is φ = 6739200.

The previous prime is 11561653. The next prime is 11561681. The reversal of 11561667 is 76616511.

It is an interprime number because it is at equal distance from previous prime (11561653) and next prime (11561681).

It is not a de Polignac number, because 11561667 - 2¹⁰ = 11560643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11561687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88192 + ... + 88322.

It is an arithmetic number, because the mean of its divisors is an integer number (547008).

Almost surely, 2^11561667 is an apocalyptic number.

11561667 is a deficient number, since it is larger than the sum of its proper divisors (5942589).

11561667 is a wasteful number, since it uses less digits than its factorization.

11561667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251.

The product of its digits is 7560, while the sum is 33.

The square root of 11561667 is about 3400.2451382217. The cubic root of 11561667 is about 226.1206119979.

The spelling of 11561667 in words is "eleven million, five hundred sixty-one thousand, six hundred sixty-seven".