660677 has 4 divisors (see below), whose sum is σ = 669120. Its totient is φ = 652236.

The previous prime is 660661. The next prime is 660683. The reversal of 660677 is 776066.

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 a cyclic number.

It is not a de Polignac number, because 660677 - 2⁴ = 660661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660607) 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, 4103 + ... + 4260.

It is an arithmetic number, because the mean of its divisors is an integer number (167280).

2⁶⁶⁰⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

660677 is a deficient number, since it is larger than the sum of its proper divisors (8443).

660677 is an equidigital number, since it uses as much as digits as its factorization.

660677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 660677 is about 812.8203983661. The cubic root of 660677 is about 87.0956362330.

The spelling of 660677 in words is "six hundred sixty thousand, six hundred seventy-seven".