572820523863666 has 64 divisors (see below), whose sum is σ = 1257204081369600. Its totient is φ = 172905191596800.

The previous prime is 572820523863649. The next prime is 572820523863743. The reversal of 572820523863666 is 666368325028275.

It is a self number, because there is not a number n which added to its sum of digits gives 572820523863666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24155860 + ... + 41583008.

It is an arithmetic number, because the mean of its divisors is an integer number (19643813771400).

Almost surely, 2^{572820523863666} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 572820523863666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628602040684800).

572820523863666 is an abundant number, since it is smaller than the sum of its proper divisors (684383557505934).

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

572820523863666 is a wasteful number, since it uses less digits than its factorization.

572820523863666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435171.

The product of its (nonzero) digits is 1045094400, while the sum is 69.

The spelling of 572820523863666 in words is "five hundred seventy-two trillion, eight hundred twenty billion, five hundred twenty-three million, eight hundred sixty-three thousand, six hundred sixty-six".