662945 has 4 divisors (see below), whose sum is σ = 795540. Its totient is φ = 530352.

The previous prime is 662941. The next prime is 662947. The reversal of 662945 is 549266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312481 + 350464 = 559^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 662945 - 2² = 662941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (662941) 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, 66290 + ... + 66299.

It is an arithmetic number, because the mean of its divisors is an integer number (198885).

2⁶⁶²⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

662945 is a deficient number, since it is larger than the sum of its proper divisors (132595).

662945 is a wasteful number, since it uses less digits than its factorization.

662945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132594.

The product of its digits is 12960, while the sum is 32.

The square root of 662945 is about 814.2143452433. The cubic root of 662945 is about 87.1951842724.

The spelling of 662945 in words is "six hundred sixty-two thousand, nine hundred forty-five".