2447783661 has 32 divisors (see below), whose sum is σ = 3503843200. Its totient is φ = 1515386880.

The previous prime is 2447783647. The next prime is 2447783677. The reversal of 2447783661 is 1663877442.

It is a happy number.

It is not a de Polignac number, because 2447783661 - 2¹⁴ = 2447767277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2447783661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2447788661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170705 + ... + 1172793.

It is an arithmetic number, because the mean of its divisors is an integer number (109495100).

Almost surely, 2^2447783661 is an apocalyptic number.

It is an amenable number.

2447783661 is a deficient number, since it is larger than the sum of its proper divisors (1056059539).

2447783661 is a wasteful number, since it uses less digits than its factorization.

2447783661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509.

The product of its digits is 1354752, while the sum is 48.

The square root of 2447783661 is about 49475.0812126670. The cubic root of 2447783661 is about 1347.6931175794.

The spelling of 2447783661 in words is "two billion, four hundred forty-seven million, seven hundred eighty-three thousand, six hundred sixty-one".