400017716866 has 4 divisors (see below), whose sum is σ = 600026575302. Its totient is φ = 200008858432.

The previous prime is 400017716851. The next prime is 400017716873. The reversal of 400017716866 is 668617710004.

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., 333415011241 + 66602705625 = 577421^2 + 258075^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100004429215 + ... + 100004429218.

Almost surely, 2^400017716866 is an apocalyptic number.

400017716866 is a deficient number, since it is larger than the sum of its proper divisors (200008858436).

400017716866 is a wasteful number, since it uses less digits than its factorization.

400017716866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200008858435.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 400017716866 in words is "four hundred billion, seventeen million, seven hundred sixteen thousand, eight hundred sixty-six".