6405040766 has 8 divisors (see below), whose sum is σ = 9668756280. Its totient is φ = 3182122008.

The previous prime is 6405040729. The next prime is 6405040769. The reversal of 6405040766 is 6670405046.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405040769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10198796 + ... + 10199423.

It is an arithmetic number, because the mean of its divisors is an integer number (1208594535).

Almost surely, 2^6405040766 is an apocalyptic number.

6405040766 is a deficient number, since it is larger than the sum of its proper divisors (3263715514).

6405040766 is a wasteful number, since it uses less digits than its factorization.

6405040766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20398378.

The product of its (nonzero) digits is 120960, while the sum is 38.

The square root of 6405040766 is about 80031.4985864941. The cubic root of 6405040766 is about 1857.1228464279.

The spelling of 6405040766 in words is "six billion, four hundred five million, forty thousand, seven hundred sixty-six".