42323642666 has 16 divisors (see below), whose sum is σ = 65688000840. Its totient is φ = 20427939840.

The previous prime is 42323642639. The next prime is 42323642677. The reversal of 42323642666 is 66624632324.

It can be written as a sum of positive squares in 4 ways, for example, as 27880650625 + 14442992041 = 166975^2 + 120179^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222890 + ... + 366506.

Almost surely, 2^42323642666 is an apocalyptic number.

42323642666 is a deficient number, since it is larger than the sum of its proper divisors (23364358174).

42323642666 is a wasteful number, since it uses less digits than its factorization.

42323642666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148729.

The product of its digits is 1492992, while the sum is 44.

The spelling of 42323642666 in words is "forty-two billion, three hundred twenty-three million, six hundred forty-two thousand, six hundred sixty-six".