2661363783 has 80 divisors (see below), whose sum is σ = 4467687840. Its totient is φ = 1568077056.

The previous prime is 2661363743. The next prime is 2661363791. The reversal of 2661363783 is 3873631662.

2661363783 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 3 + 637 + 8 + 3 = 666.

It is not a de Polignac number, because 2661363783 - 2⁸ = 2661363527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661363743) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2399233 + ... + 2400341.

It is an arithmetic number, because the mean of its divisors is an integer number (55846098).

Almost surely, 2^2661363783 is an apocalyptic number.

2661363783 is a deficient number, since it is larger than the sum of its proper divisors (1806324057).

2661363783 is a wasteful number, since it uses less digits than its factorization.

2661363783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1221 counting only the distinct ones).

The product of its digits is 653184, while the sum is 45.

The square root of 2661363783 is about 51588.4074477978. The cubic root of 2661363783 is about 1385.8027351793.

The spelling of 2661363783 in words is "two billion, six hundred sixty-one million, three hundred sixty-three thousand, seven hundred eighty-three".