56642424666 has 8 divisors (see below), whose sum is σ = 113284849344. Its totient is φ = 18880808220.

The previous prime is 56642424647. The next prime is 56642424703. The reversal of 56642424666 is 66642424665.

56642424666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

56642424666 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4720202050 + ... + 4720202061.

It is an arithmetic number, because the mean of its divisors is an integer number (14160606168).

Almost surely, 2^56642424666 is an apocalyptic number.

56642424666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56642424666 is a wasteful number, since it uses less digits than its factorization.

56642424666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440404116.

The product of its digits is 9953280, while the sum is 51.

Subtracting 56642424666 from its reverse (66642424665), we obtain a palindrome (9999999999).

The spelling of 56642424666 in words is "fifty-six billion, six hundred forty-two million, four hundred twenty-four thousand, six hundred sixty-six".