620243101566 has 144 divisors (see below), whose sum is σ = 1561981809024. Its totient is φ = 177452352000.

The previous prime is 620243101549. The next prime is 620243101591. The reversal of 620243101566 is 665101342026.

620243101566 is a `hidden beast` number, since 6 + 202 + 431 + 0 + 15 + 6 + 6 = 666.

It is a super-2 number, since 2×620243101566² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 620243101566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2656210 + ... + 2880266.

It is an arithmetic number, because the mean of its divisors is an integer number (10847095896).

Almost surely, 2^620243101566 is an apocalyptic number.

620243101566 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 620243101566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (780990904512).

620243101566 is an abundant number, since it is smaller than the sum of its proper divisors (941738707458).

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

620243101566 is a wasteful number, since it uses less digits than its factorization.

620243101566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224159 (or 224145 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 620243101566 in words is "six hundred twenty billion, two hundred forty-three million, one hundred one thousand, five hundred sixty-six".