402331606665 has 16 divisors (see below), whose sum is σ = 651486362688. Its totient is φ = 211991592896.

The previous prime is 402331606657. The next prime is 402331606693. The reversal of 402331606665 is 566606133204.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 402331606665 - 2³ = 402331606657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161577714 + ... + 161580203.

It is an arithmetic number, because the mean of its divisors is an integer number (40717897668).

Almost surely, 2^402331606665 is an apocalyptic number.

It is an amenable number.

402331606665 is a deficient number, since it is larger than the sum of its proper divisors (249154756023).

402331606665 is a wasteful number, since it uses less digits than its factorization.

402331606665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323158008.

The product of its (nonzero) digits is 466560, while the sum is 42.

Adding to 402331606665 its reverse (566606133204), we get a palindrome (968937739869).

The spelling of 402331606665 in words is "four hundred two billion, three hundred thirty-one million, six hundred six thousand, six hundred sixty-five".