2663404340 has 24 divisors (see below), whose sum is σ = 5648531112. Its totient is φ = 1054812800.

The previous prime is 2663404313. The next prime is 2663404397. The reversal of 2663404340 is 434043662.

It can be written as a sum of positive squares in 4 ways, for example, as 356907664 + 2306496676 = 18892^2 + 48026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2663404297 and 2663404306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657239 + ... + 661278.

It is an arithmetic number, because the mean of its divisors is an integer number (235355463).

Almost surely, 2^2663404340 is an apocalyptic number.

2663404340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2663404340 is an abundant number, since it is smaller than the sum of its proper divisors (2985126772).

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

2663404340 is a wasteful number, since it uses less digits than its factorization.

2663404340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318627 (or 1318625 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 2663404340 is about 51608.1809406222. The cubic root of 2663404340 is about 1386.1568251979.

The spelling of 2663404340 in words is "two billion, six hundred sixty-three million, four hundred four thousand, three hundred forty".