56783623666 has 24 divisors (see below), whose sum is σ = 106997244480. Its totient is φ = 22123489080.

The previous prime is 56783623661. The next prime is 56783623693. The reversal of 56783623666 is 66632638765.

56783623666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 56783623666.

It is not an unprimeable number, because it can be changed into a prime (56783623661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16758526 + ... + 16761913.

It is an arithmetic number, because the mean of its divisors is an integer number (4458218520).

Almost surely, 2^56783623666 is an apocalyptic number.

56783623666 is a deficient number, since it is larger than the sum of its proper divisors (50213620814).

56783623666 is a wasteful number, since it uses less digits than its factorization.

56783623666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33520470 (or 33520459 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 58.

The spelling of 56783623666 in words is "fifty-six billion, seven hundred eighty-three million, six hundred twenty-three thousand, six hundred sixty-six".