6662657 has 4 divisors (see below), whose sum is σ = 7054596. Its totient is φ = 6270720.

The previous prime is 6662651. The next prime is 6662671. The reversal of 6662657 is 7562666.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6071296 + 591361 = 2464^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 6662657 - 2⁴ = 6662641 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 6662657.

It is not an unprimeable number, because it can be changed into a prime (6662651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195944 + ... + 195977.

It is an arithmetic number, because the mean of its divisors is an integer number (1763649).

Almost surely, 2^6662657 is an apocalyptic number.

It is an amenable number.

6662657 is a deficient number, since it is larger than the sum of its proper divisors (391939).

6662657 is a wasteful number, since it uses less digits than its factorization.

6662657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391938.

The product of its digits is 90720, while the sum is 38.

The square root of 6662657 is about 2581.2123120735. The cubic root of 6662657 is about 188.1694658010.

Subtracting 6662657 from its reverse (7562666), we obtain a palindrome (900009).

The spelling of 6662657 in words is "six million, six hundred sixty-two thousand, six hundred fifty-seven".