2661344377 has 4 divisors (see below), whose sum is σ = 2661771600. Its totient is φ = 2660917156.

The previous prime is 2661344363. The next prime is 2661344381. The reversal of 2661344377 is 7734431662.

2661344377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 2661344377 - 2⁷ = 2661344249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2661344977) 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, 204127 + ... + 216772.

It is an arithmetic number, because the mean of its divisors is an integer number (665442900).

Almost surely, 2^2661344377 is an apocalyptic number.

It is an amenable number.

2661344377 is a deficient number, since it is larger than the sum of its proper divisors (427223).

2661344377 is an equidigital number, since it uses as much as digits as its factorization.

2661344377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427222.

The product of its digits is 508032, while the sum is 43.

The square root of 2661344377 is about 51588.2193625638. The cubic root of 2661344377 is about 1385.7993668620.

The spelling of 2661344377 in words is "two billion, six hundred sixty-one million, three hundred forty-four thousand, three hundred seventy-seven".