2678664464 has 20 divisors (see below), whose sum is σ = 5931328704. Its totient is φ = 1147999008.

The previous prime is 2678664451. The next prime is 2678664481. The reversal of 2678664464 is 4644668762.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

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, 11958212 + ... + 11958435.

Almost surely, 2^2678664464 is an apocalyptic number.

It is an amenable number.

2678664464 is an abundant number, since it is smaller than the sum of its proper divisors (3252664240).

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

2678664464 is a wasteful number, since it uses less digits than its factorization.

2678664464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23916662 (or 23916656 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 53.

The square root of 2678664464 is about 51755.8157505029. The cubic root of 2678664464 is about 1388.7991395057.

The spelling of 2678664464 in words is "two billion, six hundred seventy-eight million, six hundred sixty-four thousand, four hundred sixty-four".