620566 has 4 divisors (see below), whose sum is σ = 930852. Its totient is φ = 310282.

The previous prime is 620561. The next prime is 620567. The reversal of 620566 is 665026.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665026 = 2 ⋅332513.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 620566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620561) by changing a digit.

620566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155140 + ... + 155143.

It is an arithmetic number, because the mean of its divisors is an integer number (232713).

2⁶²⁰⁵⁶⁶ is an apocalyptic number.

620566 is a deficient number, since it is larger than the sum of its proper divisors (310286).

620566 is a wasteful number, since it uses less digits than its factorization.

620566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310285.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 620566 is about 787.7601157713. The cubic root of 620566 is about 85.2961297513.

The spelling of 620566 in words is "six hundred twenty thousand, five hundred sixty-six".