6630857 has 4 divisors (see below), whose sum is σ = 6656916. Its totient is φ = 6604800.

The previous prime is 6630853. The next prime is 6630859. The reversal of 6630857 is 7580366.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5400976 + 1229881 = 2324^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 6630857 - 2² = 6630853 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6630851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12644 + ... + 13157.

It is an arithmetic number, because the mean of its divisors is an integer number (1664229).

Almost surely, 2^6630857 is an apocalyptic number.

It is an amenable number.

6630857 is a deficient number, since it is larger than the sum of its proper divisors (26059).

6630857 is a wasteful number, since it uses less digits than its factorization.

6630857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26058.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 6630857 is about 2575.0450481496. The cubic root of 6630857 is about 187.8696187437.

The spelling of 6630857 in words is "six million, six hundred thirty thousand, eight hundred fifty-seven".