6662500 has 72 divisors (see below), whose sum is σ = 16077096. Its totient is φ = 2400000.

The previous prime is 6662477. The next prime is 6662507. The reversal of 6662500 is 52666.

It can be written as a sum of positive squares in 12 ways, for example, as 5456896 + 1205604 = 2336^2 + 1098^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (6662507) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 162480 + ... + 162520.

It is an arithmetic number, because the mean of its divisors is an integer number (223293).

Almost surely, 2^6662500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6662500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8038548).

6662500 is an abundant number, since it is smaller than the sum of its proper divisors (9414596).

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

6662500 is a wasteful number, since it uses less digits than its factorization.

6662500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 6662500 is about 2581.1818998281. The cubic root of 6662500 is about 188.1679877701.

The spelling of 6662500 in words is "six million, six hundred sixty-two thousand, five hundred".