10667561 has 4 divisors (see below), whose sum is σ = 11131392. Its totient is φ = 10203732.

The previous prime is 10667549. The next prime is 10667567. The reversal of 10667561 is 16576601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10667561 is a prime.

It is a super-2 number, since 2×10667561² = 227593715377442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10667567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231881 + ... + 231926.

It is an arithmetic number, because the mean of its divisors is an integer number (2782848).

Almost surely, 2^10667561 is an apocalyptic number.

It is an amenable number.

10667561 is a deficient number, since it is larger than the sum of its proper divisors (463831).

10667561 is an equidigital number, since it uses as much as digits as its factorization.

10667561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463830.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 10667561 is about 3266.1232371115. The cubic root of 10667561 is about 220.1346352202.

The spelling of 10667561 in words is "ten million, six hundred sixty-seven thousand, five hundred sixty-one".