621066044 has 6 divisors (see below), whose sum is σ = 1086865584. Its totient is φ = 310533020.

The previous prime is 621066041. The next prime is 621066109. The reversal of 621066044 is 440660126.

It is a junction number, because it is equal to n+sod(n) for n = 621065998 and 621066016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621066041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77633252 + ... + 77633259.

It is an arithmetic number, because the mean of its divisors is an integer number (181144264).

Almost surely, 2^621066044 is an apocalyptic number.

It is an amenable number.

621066044 is a deficient number, since it is larger than the sum of its proper divisors (465799540).

621066044 is a wasteful number, since it uses less digits than its factorization.

621066044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155266515 (or 155266513 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 621066044 is about 24921.1966807375. The cubic root of 621066044 is about 853.1903377063.

The spelling of 621066044 in words is "six hundred twenty-one million, sixty-six thousand, forty-four".