400666049 has 8 divisors (see below), whose sum is σ = 477813120. Its totient is φ = 328496256.

The previous prime is 400666043. The next prime is 400666051. The reversal of 400666049 is 940666004.

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

It is a cyclic number.

It is not a de Polignac number, because 400666049 - 2⁴ = 400666033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400666043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1244144 + ... + 1244465.

It is an arithmetic number, because the mean of its divisors is an integer number (59726640).

Almost surely, 2^400666049 is an apocalyptic number.

It is an amenable number.

400666049 is a deficient number, since it is larger than the sum of its proper divisors (77147071).

400666049 is a wasteful number, since it uses less digits than its factorization.

400666049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488639.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 400666049 is about 20016.6442991826. The cubic root of 400666049 is about 737.2150305323.

The spelling of 400666049 in words is "four hundred million, six hundred sixty-six thousand, forty-nine".