531666620000 has 240 divisors, whose sum is σ = 1396640931840. Its totient is φ = 198682176000.

The previous prime is 531666619997. The next prime is 531666620047. The reversal of 531666620000 is 26666135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19766561 + ... + 19793439.

It is an arithmetic number, because the mean of its divisors is an integer number (5819337216).

Almost surely, 2^531666620000 is an apocalyptic number.

531666620000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531666620000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (698320465920).

531666620000 is an abundant number, since it is smaller than the sum of its proper divisors (864974311840).

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

531666620000 is a wasteful number, since it uses less digits than its factorization.

531666620000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26975 (or 26952 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 531666620000 in words is "five hundred thirty-one billion, six hundred sixty-six million, six hundred twenty thousand".