6647157 has 16 divisors (see below), whose sum is σ = 10743360. Its totient is φ = 4028400.

The previous prime is 6647141. The next prime is 6647167. The reversal of 6647157 is 7517466.

6647157 is a `hidden beast` number, since 6 + 647 + 1 + 5 + 7 = 666.

It is not a de Polignac number, because 6647157 - 2⁴ = 6647141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6647107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10894 + ... + 11487.

It is an arithmetic number, because the mean of its divisors is an integer number (671460).

Almost surely, 2^6647157 is an apocalyptic number.

It is an amenable number.

6647157 is a deficient number, since it is larger than the sum of its proper divisors (4096203).

6647157 is a wasteful number, since it uses less digits than its factorization.

6647157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22401 (or 22395 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 6647157 is about 2578.2080986608. The cubic root of 6647157 is about 188.0234334001.

The spelling of 6647157 in words is "six million, six hundred forty-seven thousand, one hundred fifty-seven".