42668466644 has 12 divisors (see below), whose sum is σ = 77244638100. Its totient is φ = 20598570048.

The previous prime is 42668466623. The next prime is 42668466671. The reversal of 42668466644 is 44666486624.

It can be written as a sum of positive squares in 2 ways, for example, as 14158144144 + 28510322500 = 118988^2 + 168850^2 .

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 42668466644.

It is a congruent 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, 183915689 + ... + 183915920.

It is an arithmetic number, because the mean of its divisors is an integer number (6437053175).

Almost surely, 2^42668466644 is an apocalyptic number.

It is an amenable number.

42668466644 is a deficient number, since it is larger than the sum of its proper divisors (34576171456).

42668466644 is a wasteful number, since it uses less digits than its factorization.

42668466644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367831642 (or 367831640 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 56.

The spelling of 42668466644 in words is "forty-two billion, six hundred sixty-eight million, four hundred sixty-six thousand, six hundred forty-four".