2111667261 has 8 divisors (see below), whose sum is σ = 3071516064. Its totient is φ = 1279798320.

The previous prime is 2111667253. The next prime is 2111667301. The reversal of 2111667261 is 1627661112.

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

It is not a de Polignac number, because 2111667261 - 2³ = 2111667253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 63989917 = 2111667261 / (2 + 1 + 1 + 1 + 6 + 6 + 7 + 2 + 6 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111667211) 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, 31994926 + ... + 31994991.

It is an arithmetic number, because the mean of its divisors is an integer number (383939508).

Almost surely, 2^2111667261 is an apocalyptic number.

It is an amenable number.

2111667261 is a deficient number, since it is larger than the sum of its proper divisors (959848803).

2111667261 is a wasteful number, since it uses less digits than its factorization.

2111667261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63989931.

The product of its digits is 6048, while the sum is 33.

The square root of 2111667261 is about 45952.8808781343. The cubic root of 2111667261 is about 1282.9463501916.

The spelling of 2111667261 in words is "two billion, one hundred eleven million, six hundred sixty-seven thousand, two hundred sixty-one".