402402008666 has 16 divisors (see below), whose sum is σ = 690260786880. Its totient is φ = 172350810720.

The previous prime is 402402008627. The next prime is 402402008677. The reversal of 402402008666 is 666800204204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8909420 + ... + 8954471.

It is an arithmetic number, because the mean of its divisors is an integer number (43141299180).

Almost surely, 2^402402008666 is an apocalyptic number.

402402008666 is a deficient number, since it is larger than the sum of its proper divisors (287858778214).

402402008666 is a wasteful number, since it uses less digits than its factorization.

402402008666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17865509.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 402402008666 in words is "four hundred two billion, four hundred two million, eight thousand, six hundred sixty-six".