2261780966 has 4 divisors (see below), whose sum is σ = 3392671452. Its totient is φ = 1130890482.

The previous prime is 2261780947. The next prime is 2261781007. The reversal of 2261780966 is 6690871622.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2261780966.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565445240 + ... + 565445243.

It is an arithmetic number, because the mean of its divisors is an integer number (848167863).

Almost surely, 2^2261780966 is an apocalyptic number.

2261780966 is a deficient number, since it is larger than the sum of its proper divisors (1130890486).

2261780966 is a wasteful number, since it uses less digits than its factorization.

2261780966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130890485.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 2261780966 is about 47558.1850578846. The cubic root of 2261780966 is about 1312.6537441185.

The spelling of 2261780966 in words is "two billion, two hundred sixty-one million, seven hundred eighty thousand, nine hundred sixty-six".