6537668 has 6 divisors (see below), whose sum is σ = 11440926. Its totient is φ = 3268832.

The previous prime is 6537667. The next prime is 6537679. The reversal of 6537668 is 8667356.

It can be written as a sum of positive squares in only one way, i.e., 6512704 + 24964 = 2552^2 + 158^2 .

It is a super-2 number, since 2×6537668² = 85482205756448, which contains 22 as substring.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (6537667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817205 + ... + 817212.

It is an arithmetic number, because the mean of its divisors is an integer number (1906821).

Almost surely, 2^6537668 is an apocalyptic number.

It is an amenable number.

6537668 is a deficient number, since it is larger than the sum of its proper divisors (4903258).

6537668 is a wasteful number, since it uses less digits than its factorization.

6537668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634421 (or 1634419 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 6537668 is about 2556.8863877771. The cubic root of 6537668 is about 186.9853668476.

The spelling of 6537668 in words is "six million, five hundred thirty-seven thousand, six hundred sixty-eight".