400000004066 has 8 divisors (see below), whose sum is σ = 646153852764. Its totient is φ = 184615386480.

The previous prime is 400000004059. The next prime is 400000004071. The reversal of 400000004066 is 660400000004.

It can be written as a sum of positive squares in 2 ways, for example, as 386484779041 + 13515225025 = 621679^2 + 116255^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7692307745 + ... + 7692307796.

Almost surely, 2^400000004066 is an apocalyptic number.

400000004066 is a deficient number, since it is larger than the sum of its proper divisors (246153848698).

400000004066 is a wasteful number, since it uses less digits than its factorization.

400000004066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384615556.

The product of its (nonzero) digits is 576, while the sum is 20.

The spelling of 400000004066 in words is "four hundred billion, four thousand, sixty-six".