662818 has 24 divisors (see below), whose sum is σ = 1126548. Its totient is φ = 292032.

The previous prime is 662797. The next prime is 662819. The reversal of 662818 is 818266.

It can be written as a sum of positive squares in 6 ways, for example, as 299209 + 363609 = 547^2 + 603^2 .

It is a super-2 number, since 2×662818² = 878655402248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 662818.

It is not an unprimeable number, because it can be changed into a prime (662819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12480 + ... + 12532.

2⁶⁶²⁸¹⁸ is an apocalyptic number.

662818 is a deficient number, since it is larger than the sum of its proper divisors (463730).

662818 is a wasteful number, since it uses less digits than its factorization.

662818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 105 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 662818 is about 814.1363522163. The cubic root of 662818 is about 87.1896159394.

The spelling of 662818 in words is "six hundred sixty-two thousand, eight hundred eighteen".