2661344155 has 8 divisors (see below), whose sum is σ = 3361698000. Its totient is φ = 2017018656.

The previous prime is 2661344143. The next prime is 2661344159. The reversal of 2661344155 is 5514431662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661344155 is a prime.

It is a super-2 number, since 2×2661344155² = 14165505422705328050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2661344159) 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, 14006980 + ... + 14007169.

It is an arithmetic number, because the mean of its divisors is an integer number (420212250).

Almost surely, 2^2661344155 is an apocalyptic number.

2661344155 is a deficient number, since it is larger than the sum of its proper divisors (700353845).

2661344155 is a wasteful number, since it uses less digits than its factorization.

2661344155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28014173.

The product of its digits is 86400, while the sum is 37.

The square root of 2661344155 is about 51588.2172109097. The cubic root of 2661344155 is about 1385.7993283292.

The spelling of 2661344155 in words is "two billion, six hundred sixty-one million, three hundred forty-four thousand, one hundred fifty-five".