6320661440 has 56 divisors (see below), whose sum is σ = 15068153760. Its totient is φ = 2525395968.

The previous prime is 6320661427. The next prime is 6320661463. The reversal of 6320661440 is 441660236.

It is a super-2 number, since 2×6320661440² = 79901522078205747200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 6320661397 and 6320661406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283334 + ... + 304826.

Almost surely, 2^6320661440 is an apocalyptic number.

It is an amenable number.

6320661440 is an abundant number, since it is smaller than the sum of its proper divisors (8747492320).

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

6320661440 is a wasteful number, since it uses less digits than its factorization.

6320661440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22429 (or 22419 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 6320661440 is about 79502.5876308438. The cubic root of 6320661440 is about 1848.9315905431.

The spelling of 6320661440 in words is "six billion, three hundred twenty million, six hundred sixty-one thousand, four hundred forty".