6499816 has 8 divisors (see below), whose sum is σ = 12187170. Its totient is φ = 3249904.

The previous prime is 6499793. The next prime is 6499841. The reversal of 6499816 is 6189946.

It can be written as a sum of positive squares in only one way, i.e., 3437316 + 3062500 = 1854^2 + 1750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a pancake number, because a pancake can be divided into 6499816 parts by 3605 straight cuts.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406231 + ... + 406246.

Almost surely, 2^6499816 is an apocalyptic number.

It is an amenable number.

6499816 is a deficient number, since it is larger than the sum of its proper divisors (5687354).

6499816 is a wasteful number, since it uses less digits than its factorization.

6499816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812483 (or 812479 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 6499816 is about 2549.4736711721. The cubic root of 6499816 is about 186.6237968446.

The spelling of 6499816 in words is "six million, four hundred ninety-nine thousand, eight hundred sixteen".