6657480 has 48 divisors (see below), whose sum is σ = 21637980. Its totient is φ = 1775232.

The previous prime is 6657473. The next prime is 6657517. The reversal of 6657480 is 847566.

It is a happy number.

6657480 is a `hidden beast` number, since 6 + 6 + 574 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6563844 + 93636 = 2562^2 + 306^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8887 + ... + 9606.

Almost surely, 2^6657480 is an apocalyptic number.

6657480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6657480 is an abundant number, since it is smaller than the sum of its proper divisors (14980500).

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

6657480 is a wasteful number, since it uses less digits than its factorization.

6657480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18510 (or 18503 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 6657480 is about 2580.2092938365. The cubic root of 6657480 is about 188.1207161933.

The spelling of 6657480 in words is "six million, six hundred fifty-seven thousand, four hundred eighty".