2668348440 has 64 divisors (see below), whose sum is σ = 8894498400. Its totient is φ = 711559296.

The previous prime is 2668348421. The next prime is 2668348447. The reversal of 2668348440 is 448438662.

2668348440 is a `hidden beast` number, since 266 + 8 + 348 + 4 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668348447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1234267 + ... + 1236426.

Almost surely, 2^2668348440 is an apocalyptic number.

2668348440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2668348440 is an abundant number, since it is smaller than the sum of its proper divisors (6226149960).

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

2668348440 is a wasteful number, since it uses less digits than its factorization.

2668348440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2470713 (or 2470703 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The square root of 2668348440 is about 51656.0590831318. The cubic root of 2668348440 is about 1387.0140065645.

The spelling of 2668348440 in words is "two billion, six hundred sixty-eight million, three hundred forty-eight thousand, four hundred forty".