660907 has 4 divisors (see below), whose sum is σ = 711760. Its totient is φ = 610056.

The previous prime is 660901. The next prime is 660917. The reversal of 660907 is 709066.

660907 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: 709066 = 2 ⋅354533.

It is a cyclic number.

It is not a de Polignac number, because 660907 - 2³ = 660899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660901) 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, 25407 + ... + 25432.

It is an arithmetic number, because the mean of its divisors is an integer number (177940).

2⁶⁶⁰⁹⁰⁷ is an apocalyptic number.

660907 is a deficient number, since it is larger than the sum of its proper divisors (50853).

660907 is a wasteful number, since it uses less digits than its factorization.

660907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50852.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 660907 is about 812.9618687245. The cubic root of 660907 is about 87.1057418632.

The spelling of 660907 in words is "six hundred sixty thousand, nine hundred seven".