620666100146556 has 72 divisors (see below), whose sum is σ = 1569637566871920. Its totient is φ = 206792231095296.

The previous prime is 620666100146489. The next prime is 620666100146557. The reversal of 620666100146556 is 655641001666026.

620666100146556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×620666100146556² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620666100146557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4586281900 + ... + 4586417228.

It is an arithmetic number, because the mean of its divisors is an integer number (21800521762110).

Almost surely, 2^{620666100146556} is an apocalyptic number.

It is an amenable number.

620666100146556 is an abundant number, since it is smaller than the sum of its proper divisors (948971466725364).

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

620666100146556 is a wasteful number, since it uses less digits than its factorization.

620666100146556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193803 (or 193798 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 620666100146556 in words is "six hundred twenty trillion, six hundred sixty-six billion, one hundred million, one hundred forty-six thousand, five hundred fifty-six".