1006657 has 4 divisors (see below), whose sum is σ = 1011076. Its totient is φ = 1002240.

The previous prime is 1006651. The next prime is 1006711. The reversal of 1006657 is 7566001.

1006657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7566001 = 1801 ⋅4201.

It can be written as a sum of positive squares in 2 ways, for example, as 853776 + 152881 = 924^2 + 391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006651) 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, 1848 + ... + 2329.

It is an arithmetic number, because the mean of its divisors is an integer number (252769).

2^1006657 is an apocalyptic number.

It is an amenable number.

1006657 is a deficient number, since it is larger than the sum of its proper divisors (4419).

1006657 is an equidigital number, since it uses as much as digits as its factorization.

1006657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 1006657 is about 1003.3229789056. The cubic root of 1006657 is about 100.2214094169.

The spelling of 1006657 in words is "one million, six thousand, six hundred fifty-seven".