402404066646 has 8 divisors (see below), whose sum is σ = 804808133304. Its totient is φ = 134134688880.

The previous prime is 402404066629. The next prime is 402404066707. The reversal of 402404066646 is 646660404204.

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

402404066646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 402404066598 and 402404066607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33533672215 + ... + 33533672226.

It is an arithmetic number, because the mean of its divisors is an integer number (100601016663).

Almost surely, 2^402404066646 is an apocalyptic number.

402404066646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402404066646 is a wasteful number, since it uses less digits than its factorization.

402404066646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67067344446.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 402404066646 in words is "four hundred two billion, four hundred four million, sixty-six thousand, six hundred forty-six".