400665404403 has 12 divisors (see below), whose sum is σ = 631351546488. Its totient is φ = 242827517760.

The previous prime is 400665404393. The next prime is 400665404411. The reversal of 400665404403 is 304404566004.

It is not a de Polignac number, because 400665404403 - 2⁴ = 400665404387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400665404443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2023562550 + ... + 2023562747.

It is an arithmetic number, because the mean of its divisors is an integer number (52612628874).

Almost surely, 2^400665404403 is an apocalyptic number.

400665404403 is a deficient number, since it is larger than the sum of its proper divisors (230686142085).

400665404403 is a wasteful number, since it uses less digits than its factorization.

400665404403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4047125314 (or 4047125311 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 400665404403 in words is "four hundred billion, six hundred sixty-five million, four hundred four thousand, four hundred three".