660351 has 8 divisors (see below), whose sum is σ = 901120. Its totient is φ = 429912.

The previous prime is 660349. The next prime is 660367. The reversal of 660351 is 153066.

660351 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 660351 - 2¹ = 660349 is a prime.

It is a Duffinian number.

660351 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431 + ... + 2688.

It is an arithmetic number, because the mean of its divisors is an integer number (112640).

2⁶⁶⁰³⁵¹ is an apocalyptic number.

660351 is a deficient number, since it is larger than the sum of its proper divisors (240769).

660351 is a wasteful number, since it uses less digits than its factorization.

660351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5165.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 660351 is about 812.6198373163. The cubic root of 660351 is about 87.0813085819.

The spelling of 660351 in words is "six hundred sixty thousand, three hundred fifty-one".