42355675666 has 8 divisors (see below), whose sum is σ = 63543464460. Its totient is φ = 21174520848.

The previous prime is 42355675651. The next prime is 42355675669. The reversal of 42355675666 is 66657655324.

It can be written as a sum of positive squares in 2 ways, for example, as 40664739025 + 1690936641 = 201655^2 + 41121^2 .

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

It is a super-2 number, since 2×42355675666² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42355675669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1642501 + ... + 1668088.

Almost surely, 2^42355675666 is an apocalyptic number.

42355675666 is a deficient number, since it is larger than the sum of its proper divisors (21187788794).

42355675666 is a wasteful number, since it uses less digits than its factorization.

42355675666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3316988.

The product of its digits is 27216000, while the sum is 55.

The spelling of 42355675666 in words is "forty-two billion, three hundred fifty-five million, six hundred seventy-five thousand, six hundred sixty-six".