6366440 has 16 divisors (see below), whose sum is σ = 14324580. Its totient is φ = 2546560.

The previous prime is 6366433. The next prime is 6366461. The reversal of 6366440 is 446636.

It can be written as a sum of positive squares in 2 ways, for example, as 6160324 + 206116 = 2482^2 + 454^2 .

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, 79541 + ... + 79620.

Almost surely, 2^6366440 is an apocalyptic number.

It is an amenable number.

6366440 is an abundant number, since it is smaller than the sum of its proper divisors (7958140).

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

6366440 is a wasteful number, since it uses less digits than its factorization.

6366440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159172 (or 159168 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 6366440 is about 2523.1805325818. The cubic root of 6366440 is about 185.3384600253.

The spelling of 6366440 in words is "six million, three hundred sixty-six thousand, four hundred forty".