404545442666 has 4 divisors (see below), whose sum is σ = 606818164002. Its totient is φ = 202272721332.

The previous prime is 404545442641. The next prime is 404545442677. The reversal of 404545442666 is 666244545404.

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., 380325057025 + 24220385641 = 616705^2 + 155629^2 .

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 as a sum of consecutive naturals, namely, 101136360665 + ... + 101136360668.

Almost surely, 2^404545442666 is an apocalyptic number.

404545442666 is a deficient number, since it is larger than the sum of its proper divisors (202272721336).

404545442666 is a wasteful number, since it uses less digits than its factorization.

404545442666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202272721335.

The product of its (nonzero) digits is 11059200, while the sum is 50.

The spelling of 404545442666 in words is "four hundred four billion, five hundred forty-five million, four hundred forty-two thousand, six hundred sixty-six".