621066 has 8 divisors (see below), whose sum is σ = 1242144. Its totient is φ = 207020.

The previous prime is 621059. The next prime is 621083. The reversal of 621066 is 660126.

It is a sphenic number, since it is the product of 3 distinct primes.

621066 is an admirable number.

It is a plaindrome in base 14.

It is an unprimeable number.

621066 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 in 3 ways as a sum of consecutive naturals, for example, 51750 + ... + 51761.

It is an arithmetic number, because the mean of its divisors is an integer number (155268).

2⁶²¹⁰⁶⁶ is an apocalyptic number.

621066 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.

621066 is a wasteful number, since it uses less digits than its factorization.

621066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103516.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 621066 is about 788.0774073655. The cubic root of 621066 is about 85.3190317558.

Subtracting 621066 from its reverse (660126), we obtain a triangular number (39060 = T₂₇₉).

It can be divided in two parts, 62 and 1066, that added together give a triangular number (1128 = T₄₇).

The spelling of 621066 in words is "six hundred twenty-one thousand, sixty-six".