6499957 has 8 divisors (see below), whose sum is σ = 6888800. Its totient is φ = 6115824.

The previous prime is 6499949. The next prime is 6499991. The reversal of 6499957 is 7599946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6499957 - 2³ = 6499949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6499957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1894 + ... + 4072.

It is an arithmetic number, because the mean of its divisors is an integer number (861100).

Almost surely, 2^6499957 is an apocalyptic number.

It is an amenable number.

6499957 is a deficient number, since it is larger than the sum of its proper divisors (388843).

6499957 is a wasteful number, since it uses less digits than its factorization.

6499957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2355.

The product of its digits is 612360, while the sum is 49.

The square root of 6499957 is about 2549.5013237886. The cubic root of 6499957 is about 186.6251463067.

It can be divided in two parts, 64999 and 57, that added together give a palindrome (65056).

The spelling of 6499957 in words is "six million, four hundred ninety-nine thousand, nine hundred fifty-seven".