6400366278 has 16 divisors (see below), whose sum is σ = 13553717040. Its totient is φ = 2007958016.

The previous prime is 6400366267. The next prime is 6400366279. The reversal of 6400366278 is 8726630046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400366279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31374243 + ... + 31374446.

It is an arithmetic number, because the mean of its divisors is an integer number (847107315).

Almost surely, 2^6400366278 is an apocalyptic number.

6400366278 is an abundant number, since it is smaller than the sum of its proper divisors (7153350762).

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

6400366278 is a wasteful number, since it uses less digits than its factorization.

6400366278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62748711.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 6400366278 is about 80002.2892047471. The cubic root of 6400366278 is about 1856.6709517668.

The spelling of 6400366278 in words is "six billion, four hundred million, three hundred sixty-six thousand, two hundred seventy-eight".