402666064 has 30 divisors (see below), whose sum is σ = 785935374. Its totient is φ = 199854720.

The previous prime is 402666059. The next prime is 402666067. The reversal of 402666064 is 460666204.

It can be written as a sum of positive squares in 3 ways, for example, as 19289664 + 383376400 = 4392^2 + 19580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402666067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393874 + ... + 394894.

Almost surely, 2^402666064 is an apocalyptic number.

It is an amenable number.

402666064 is a deficient number, since it is larger than the sum of its proper divisors (383269310).

402666064 is a wasteful number, since it uses less digits than its factorization.

402666064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1180 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 402666064 is about 20066.5409076901. The cubic root of 402666064 is about 738.4396535225.

The spelling of 402666064 in words is "four hundred two million, six hundred sixty-six thousand, sixty-four".