621066880 has 128 divisors (see below), whose sum is σ = 1709585280. Its totient is φ = 211341312.

The previous prime is 621066857. The next prime is 621066911. The reversal of 621066880 is 88660126.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×621066880³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 702919 + ... + 703801.

It is an arithmetic number, because the mean of its divisors is an integer number (13356135).

Almost surely, 2^621066880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621066880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (854792640).

621066880 is an abundant number, since it is smaller than the sum of its proper divisors (1088518400).

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

621066880 is a wasteful number, since it uses less digits than its factorization.

621066880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 621066880 is about 24921.2134536021. The cubic root of 621066880 is about 853.1907205249.

It can be divided in two parts, 62106 and 6880, that added together give a palindrome (68986).

The spelling of 621066880 in words is "six hundred twenty-one million, sixty-six thousand, eight hundred eighty".