2667565541 has 4 divisors (see below), whose sum is σ = 2686756800. Its totient is φ = 2648374284.

The previous prime is 2667565499. The next prime is 2667565543. The reversal of 2667565541 is 1455657662.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1455657662 = 2 ⋅727828831.

It is a cyclic number.

It is not a de Polignac number, because 2667565541 - 2¹⁰ = 2667564517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2667565543) 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, 9595421 + ... + 9595698.

It is an arithmetic number, because the mean of its divisors is an integer number (671689200).

Almost surely, 2^2667565541 is an apocalyptic number.

It is an amenable number.

2667565541 is a deficient number, since it is larger than the sum of its proper divisors (19191259).

2667565541 is a wasteful number, since it uses less digits than its factorization.

2667565541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19191258.

The product of its digits is 1512000, while the sum is 47.

The square root of 2667565541 is about 51648.4805294406. The cubic root of 2667565541 is about 1386.8783423610.

The spelling of 2667565541 in words is "two billion, six hundred sixty-seven million, five hundred sixty-five thousand, five hundred forty-one".