442678273666 has 4 divisors (see below), whose sum is σ = 664017410502. Its totient is φ = 221339136832.

The previous prime is 442678273637. The next prime is 442678273729. The reversal of 442678273666 is 666372876244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 368078823025 + 74599450641 = 606695^2 + 273129^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110669568415 + ... + 110669568418.

Almost surely, 2^442678273666 is an apocalyptic number.

442678273666 is a deficient number, since it is larger than the sum of its proper divisors (221339136836).

442678273666 is a wasteful number, since it uses less digits than its factorization.

442678273666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221339136835.

The product of its digits is 97542144, while the sum is 61.

The spelling of 442678273666 in words is "four hundred forty-two billion, six hundred seventy-eight million, two hundred seventy-three thousand, six hundred sixty-six".