660465 has 24 divisors (see below), whose sum is σ = 1233960. Its totient is φ = 324864.

The previous prime is 660449. The next prime is 660493. The reversal of 660465 is 564066.

660465 is digitally balanced in base 2 and base 7, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 9216 + 651249 = 96^2 + 807^2 .

It is not a de Polignac number, because 660465 - 2⁴ = 660449 is a prime.

660465 is strictly pandigital in base 7.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21 + ... + 1149.

It is an arithmetic number, because the mean of its divisors is an integer number (51415).

2⁶⁶⁰⁴⁶⁵ is an apocalyptic number.

660465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

660465 is a deficient number, since it is larger than the sum of its proper divisors (573495).

660465 is a wasteful number, since it uses less digits than its factorization.

660465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 660465 is about 812.6899777898. The cubic root of 660465 is about 87.0863194009.

The spelling of 660465 in words is "six hundred sixty thousand, four hundred sixty-five".