6663437460 has 60 divisors (see below), whose sum is σ = 20903455188. Its totient is φ = 1776916224.

The previous prime is 6663437359. The next prime is 6663437477. The reversal of 6663437460 is 647343666.

It can be written as a sum of positive squares in 2 ways, for example, as 4732889616 + 1930547844 = 68796^2 + 43938^2 .

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2054997 + ... + 2058236.

Almost surely, 2^6663437460 is an apocalyptic number.

6663437460 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6663437460 is an abundant number, since it is smaller than the sum of its proper divisors (14240017728).

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

6663437460 is a wasteful number, since it uses less digits than its factorization.

6663437460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113254 (or 4113243 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 45.

The square root of 6663437460 is about 81629.8809260433. The cubic root of 6663437460 is about 1881.7681287025.

The spelling of 6663437460 in words is "six billion, six hundred sixty-three million, four hundred thirty-seven thousand, four hundred sixty".