820662 has 8 divisors (see below), whose sum is σ = 1641336. Its totient is φ = 273552.

The previous prime is 820657. The next prime is 820679. The reversal of 820662 is 266028.

820662 is digitally balanced in base 2, 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.

820662 is an admirable number.

It is a super-2 number, since 2×820662² = 1346972236488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68383 + ... + 68394.

It is an arithmetic number, because the mean of its divisors is an integer number (205167).

2⁸²⁰⁶⁶² is an apocalyptic number.

820662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

820662 is a wasteful number, since it uses less digits than its factorization.

820662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136782.

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

The square root of 820662 is about 905.9039684205. The cubic root of 820662 is about 93.6241974842.

The spelling of 820662 in words is "eight hundred twenty thousand, six hundred sixty-two".