6381657 has 12 divisors (see below), whose sum is σ = 9247524. Its totient is φ = 4240800.

The previous prime is 6381643. The next prime is 6381659. The reversal of 6381657 is 7561836.

6381657 is a `hidden beast` number, since 638 + 16 + 5 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1806336 + 4575321 = 1344^2 + 2139^2 .

It is not a de Polignac number, because 6381657 - 2¹⁵ = 6348889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6381659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2407 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (770627).

Almost surely, 2^6381657 is an apocalyptic number.

It is an amenable number.

6381657 is a deficient number, since it is larger than the sum of its proper divisors (2865867).

6381657 is a wasteful number, since it uses less digits than its factorization.

6381657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280 (or 2277 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 6381657 is about 2526.1941730595. The cubic root of 6381657 is about 185.4860072318.

The spelling of 6381657 in words is "six million, three hundred eighty-one thousand, six hundred fifty-seven".