660957 has 8 divisors (see below), whose sum is σ = 961440. Its totient is φ = 400560.

The previous prime is 660949. The next prime is 660973. The reversal of 660957 is 759066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 660957 - 2³ = 660949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20029 = 660957 / (6 + 6 + 0 + 9 + 5 + 7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9982 + ... + 10047.

It is an arithmetic number, because the mean of its divisors is an integer number (120180).

2⁶⁶⁰⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

660957 is a deficient number, since it is larger than the sum of its proper divisors (300483).

660957 is a wasteful number, since it uses less digits than its factorization.

660957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20043.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 660957 is about 812.9926198927. The cubic root of 660957 is about 87.1079384291.

It can be divided in two parts, 6609 and 57, that added together give a palindrome (6666).

The spelling of 660957 in words is "six hundred sixty thousand, nine hundred fifty-seven".