606657 has 4 divisors (see below), whose sum is σ = 808880. Its totient is φ = 404436.

The previous prime is 606653. The next prime is 606659. The reversal of 606657 is 756606.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 606657 - 2² = 606653 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (606653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101107 + ... + 101112.

It is an arithmetic number, because the mean of its divisors is an integer number (202220).

2⁶⁰⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

606657 is a deficient number, since it is larger than the sum of its proper divisors (202223).

606657 is a wasteful number, since it uses less digits than its factorization.

606657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202222.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 606657 is about 778.8818909180. The cubic root of 606657 is about 84.6540494835.

The spelling of 606657 in words is "six hundred six thousand, six hundred fifty-seven".