662820 has 24 divisors (see below), whose sum is σ = 1856064. Its totient is φ = 176736.

The previous prime is 662819. The next prime is 662833. The reversal of 662820 is 28266.

It is a super-3 number, since 3×662820³ = 873590832533304000, which contains 333 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 662820.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5464 + ... + 5583.

It is an arithmetic number, because the mean of its divisors is an integer number (77336).

2⁶⁶²⁸²⁰ is an apocalyptic number.

662820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

662820 is an abundant number, since it is smaller than the sum of its proper divisors (1193244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

662820 is a wasteful number, since it uses less digits than its factorization.

662820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11059 (or 11057 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 662820 is about 814.1375805108. The cubic root of 662820 is about 87.1897036352.

It can be divided in two parts, 6 and 62820, that added together give a palindrome (62826).

The spelling of 662820 in words is "six hundred sixty-two thousand, eight hundred twenty".