2667906561 has 8 divisors (see below), whose sum is σ = 3558184704. Its totient is φ = 1778116400.

The previous prime is 2667906559. The next prime is 2667906583. The reversal of 2667906561 is 1656097662.

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

It is a cyclic number.

It is not a de Polignac number, because 2667906561 - 2¹ = 2667906559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2667906561.

It is not an unprimeable number, because it can be changed into a prime (2667906541) 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 7 ways as a sum of consecutive naturals, for example, 109041 + ... + 131246.

It is an arithmetic number, because the mean of its divisors is an integer number (444773088).

Almost surely, 2^2667906561 is an apocalyptic number.

It is an amenable number.

2667906561 is a deficient number, since it is larger than the sum of its proper divisors (890278143).

2667906561 is a wasteful number, since it uses less digits than its factorization.

2667906561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243991.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 2667906561 is about 51651.7817795282. The cubic root of 2667906561 is about 1386.9374390783.

The spelling of 2667906561 in words is "two billion, six hundred sixty-seven million, nine hundred six thousand, five hundred sixty-one".