2667561 has 8 divisors (see below), whose sum is σ = 3830400. Its totient is φ = 1641552.

The previous prime is 2667503. The next prime is 2667569. The reversal of 2667561 is 1657662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2667561 - 2⁷ = 2667433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2667569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34161 + ... + 34238.

It is an arithmetic number, because the mean of its divisors is an integer number (478800).

2^2667561 is an apocalyptic number.

It is an amenable number.

2667561 is a deficient number, since it is larger than the sum of its proper divisors (1162839).

2667561 is a wasteful number, since it uses less digits than its factorization.

2667561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68415.

The product of its digits is 15120, while the sum is 33.

The square root of 2667561 is about 1633.2669714410. The cubic root of 2667561 is about 138.6877555399.

The spelling of 2667561 in words is "two million, six hundred sixty-seven thousand, five hundred sixty-one".