660697 has 4 divisors (see below), whose sum is σ = 662400. Its totient is φ = 658996.

The previous prime is 660683. The next prime is 660719. The reversal of 660697 is 796066.

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, and also an emirpimes, since its reverse is a distinct semiprime: 796066 = 2 ⋅398033.

It is a cyclic number.

It is not a de Polignac number, because 660697 - 2¹¹ = 658649 is a prime.

It is a Duffinian 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, 48 + ... + 1150.

It is an arithmetic number, because the mean of its divisors is an integer number (165600).

2⁶⁶⁰⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

660697 is a deficient number, since it is larger than the sum of its proper divisors (1703).

660697 is a wasteful number, since it uses less digits than its factorization.

660697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 660697 is about 812.8327011138. The cubic root of 660697 is about 87.0965150766.

The spelling of 660697 in words is "six hundred sixty thousand, six hundred ninety-seven".