2661611267 has 8 divisors (see below), whose sum is σ = 3174095616. Its totient is φ = 2182190472.

The previous prime is 2661611261. The next prime is 2661611297. The reversal of 2661611267 is 7621161662.

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

It is not a de Polignac number, because 2661611267 - 2²² = 2657416963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2661611267.

It is not an unprimeable number, because it can be changed into a prime (2661611261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8265713 + ... + 8266034.

It is an arithmetic number, because the mean of its divisors is an integer number (396761952).

Almost surely, 2^2661611267 is an apocalyptic number.

2661611267 is a deficient number, since it is larger than the sum of its proper divisors (512484349).

2661611267 is a wasteful number, since it uses less digits than its factorization.

2661611267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16531777.

The product of its digits is 36288, while the sum is 38.

The square root of 2661611267 is about 51590.8060316952. The cubic root of 2661611267 is about 1385.8456897698.

The spelling of 2661611267 in words is "two billion, six hundred sixty-one million, six hundred eleven thousand, two hundred sixty-seven".